diff --git a/models/134530.diagram b/models/134530.diagram
index 7ed08b7..44439ce 100644
--- a/models/134530.diagram
+++ b/models/134530.diagram
@@ -1,59 +1,59 @@
 format 224
 
 classinstance 128002 class_ref 156628 // Klient
-  name ""   xyz 75 28 2000 life_line_z 2000
+  name ""   xyz 97 4 2000 life_line_z 2000
 classinstance 128130 class_ref 134530 // KlawiaturaKontroler
-  name ""   xyz 179 38 2000 life_line_z 2000
+  name ""   xyz 244 12 2000 life_line_z 2000
 classinstance 128258 class_ref 156756 // AutomatKontroler
-  name ""   xyz 382 41 2000 life_line_z 2000
+  name ""   xyz 458 15 2000 life_line_z 2000
 classinstance 128386 class_ref 134658 // ListaProduktow
-  name ""   xyz 571 40 2000 life_line_z 2000
+  name ""   xyz 662 11 2005 life_line_z 2000
 durationcanvas 128514 classinstance_ref 128002 // :Klient
-  xyzwh 86 136 2010 11 69
+  xyzwh 108 102 2010 11 40
 end
 durationcanvas 128642 classinstance_ref 128130 // :KlawiaturaKontroler
-  xyzwh 229 142 2010 11 54
+  xyzwh 294 102 2010 11 80
 end
-durationcanvas 128898 classinstance_ref 128258 // :AutomatKontroler
-  xyzwh 426 143 2010 11 66
+durationcanvas 129026 classinstance_ref 128258 // :AutomatKontroler
+  xyzwh 502 109 2010 11 91
 end
-durationcanvas 129154 classinstance_ref 128386 // :ListaProduktow
-  xyzwh 610 148 2010 11 57
+durationcanvas 129282 classinstance_ref 128386 // :ListaProduktow
+  xyzwh 701 118 2010 11 82
 end
 msg 128770 synchronous
   from durationcanvas_ref 128514
   to durationcanvas_ref 128642
-  yz 143 2015 explicitmsg "wybierzKodProduktu(numer:int)"
+  yz 102 2015 explicitmsg "wybierzKodProduktu(numer: int)"
   show_full_operations_definition default show_class_of_operation default drawing_language default show_context_mode default
-  label_xy 87 129
-msg 129026 synchronous
-  from durationcanvas_ref 128642
-  to durationcanvas_ref 128898
-  yz 150 2020 explicitmsg "wybierzProdukt(numer:int)"
-  show_full_operations_definition default show_class_of_operation default drawing_language default show_context_mode default
-  label_xy 269 136
-msg 129282 synchronous
-  from durationcanvas_ref 128898
-  to durationcanvas_ref 129154
-  yz 155 2015 explicitmsg "wybierzProdukt(numer:int)"
-  show_full_operations_definition default show_class_of_operation default drawing_language default show_context_mode default
-  label_xy 459 141
-msg 129410 return
-  from durationcanvas_ref 129154
-  to durationcanvas_ref 128898
-  yz 194 2020 explicitmsg "produkt = wybierzProdukt(numer:int)"
-  show_full_operations_definition default show_class_of_operation default drawing_language default show_context_mode default
-  label_xy 435 180
-msg 129538 return
-  from durationcanvas_ref 128898
-  to durationcanvas_ref 128642
-  yz 177 2015 explicitmsg "produkt = wybierzProdukt(numer:int)"
-  show_full_operations_definition default show_class_of_operation default drawing_language default show_context_mode default
-  label_xy 269 163
-msg 129666 return
+  label_xy 91 88
+msg 128898 return
   from durationcanvas_ref 128642
   to durationcanvas_ref 128514
-  yz 178 2020 explicitmsg "produkt = wybierzKodProduktu(numer:int)"
+  yz 127 2020 explicitmsg "produkt = wybierzKodProduktu(numer: int)"
   show_full_operations_definition default show_class_of_operation default drawing_language default show_context_mode default
-  label_xy 63 164
+  label_xy 99 112
+msg 129154 synchronous
+  from durationcanvas_ref 128642
+  to durationcanvas_ref 129026
+  yz 109 2015 explicitmsg "wybierzKodProduktu(numer: int)"
+  show_full_operations_definition default show_class_of_operation default drawing_language default show_context_mode default
+  label_xy 327 95
+msg 129410 synchronous
+  from durationcanvas_ref 129026
+  to durationcanvas_ref 129282
+  yz 118 2015 explicitmsg "wybierzKodProduktu(numer :int)"
+  show_full_operations_definition default show_class_of_operation default drawing_language default show_context_mode default
+  label_xy 531 104
+msg 129538 return
+  from durationcanvas_ref 129282
+  to durationcanvas_ref 129026
+  yz 189 2020 explicitmsg "produkt = wybierzKodProduktu(numer: int)"
+  show_full_operations_definition default show_class_of_operation default drawing_language default show_context_mode default
+  label_xy 507 173
+msg 129666 return
+  from durationcanvas_ref 129026
+  to durationcanvas_ref 128642
+  yz 158 3005 explicitmsg "produkt = wybierzKodProduktu(numer: int)"
+  show_full_operations_definition default show_class_of_operation default drawing_language default show_context_mode default
+  label_xy 303 144
 end
diff --git a/models/134658.diagram b/models/134658.diagram
index 47ab8fe..4001dd3 100644
--- a/models/134658.diagram
+++ b/models/134658.diagram
@@ -1,69 +1,65 @@
 format 224
 
 classinstance 128002 class_ref 156628 // Klient
-  name ""   xyz 116 4 2000 life_line_z 2000
-classinstance 128258 class_ref 134914 // KasetaKontroler
-  name ""   xyz 317 19 2000 life_line_z 2000
-classinstance 129026 class_ref 156756 // AutomatKontroler
-  name ""   xyz 521 26 2005 life_line_z 2000
-classinstance 129154 class_ref 141442 // EkranKontroler
-  name ""   xyz 709 12 2010 life_line_z 2000
-textcanvas 130946 "<<create>>"
-  xyzwh 721 149 3005 55 14
-textcanvas 131074 "<<create>>"
-  xyzwh 800 159 2030 55 14
-durationcanvas 129282 classinstance_ref 128002 // :Klient
-  xyzwh 127 96 2010 11 40
+  name ""   xyz 27 37 2000 life_line_z 2000
+classinstance 128130 class_ref 134786 // KasetaKontroler
+  name ""   xyz 208 32 2000 life_line_z 2000
+classinstance 128258 class_ref 156756 // AutomatKontroler
+  name ""   xyz 387 36 2000 life_line_z 2000
+classinstance 128386 class_ref 134914 // EkranKontroler
+  name ""   xyz 608 39 2000 life_line_z 2000
+durationcanvas 128514 classinstance_ref 128002 // :Klient
+  xyzwh 38 149 2010 11 41
 end
-durationcanvas 129410 classinstance_ref 128258 // :KasetaKontroler
-  xyzwh 358 98 2010 11 111
-  overlappingdurationcanvas 130434
-    xyzwh 364 120 2020 11 25
+durationcanvas 128642 classinstance_ref 128130 // :KasetaKontroler
+  xyzwh 249 149 2010 11 135
+  overlappingdurationcanvas 129666
+    xyzwh 255 184 2020 11 25
   end
-  overlappingdurationcanvas 130690
-    xyzwh 364 179 2020 11 25
+  overlappingdurationcanvas 129922
+    xyzwh 255 253 2020 11 25
   end
 end
-durationcanvas 129666 classinstance_ref 129026 // :AutomatKontroler
-  xyzwh 565 100 2010 11 80
+durationcanvas 128898 classinstance_ref 128258 // :AutomatKontroler
+  xyzwh 431 157 2010 11 26
 end
-durationcanvas 129922 classinstance_ref 129154 // :EkranKontroler
-  xyzwh 746 102 2010 11 112
-  overlappingdurationcanvas 130178
-    xyzwh 752 149 2020 11 38
+durationcanvas 129154 classinstance_ref 128386 // :EkranKontroler
+  xyzwh 645 168 2010 11 81
+  overlappingdurationcanvas 129410
+    xyzwh 651 177 2020 11 66
   end
 end
-msg 129538 synchronous
-  from durationcanvas_ref 129282
+msg 128770 synchronous
+  from durationcanvas_ref 128514
+  to durationcanvas_ref 128642
+  yz 149 2015 explicitmsg "wprowadzPieniadze(monety: money, banknoty: money)"
+  show_full_operations_definition default show_class_of_operation default drawing_language default show_context_mode default
+  label_xy -31 135
+msg 129026 synchronous
+  from durationcanvas_ref 128642
+  to durationcanvas_ref 128898
+  yz 157 2015 explicitmsg "przekarzPieniadze(monety: money, banknoty: money)"
+  show_full_operations_definition default show_class_of_operation default drawing_language default show_context_mode default
+  label_xy 217 143
+msg 129282 synchronous
+  from durationcanvas_ref 128898
+  to durationcanvas_ref 129154
+  yz 168 2020 explicitmsg "wyswietlKwote(monety: money, banknoty: money, produkt: int)"
+  show_full_operations_definition default show_class_of_operation default drawing_language default show_context_mode default
+  label_xy 392 154
+reflexivemsg 129538 synchronous
   to durationcanvas_ref 129410
-  yz 98 2015 explicitmsg "WprowadzPieniadze(monety: money, bankoty: money)"
+  yz 177 2025 explicitmsg "wyswietPozostalalKwote(monety: money, banknoty: money, produkt: int)"
   show_full_operations_definition default show_class_of_operation default drawing_language default show_context_mode default
-  label_xy 88 84
-msg 129794 synchronous
-  from durationcanvas_ref 129410
+  label_xy 665 186
+reflexivemsg 129794 synchronous
   to durationcanvas_ref 129666
-  yz 102 2015 explicitmsg "PrzekazKwote(monety: money, banknoty: money)"
+  yz 184 2025 explicitmsg "sprawdzMonety(monety: money)"
   show_full_operations_definition default show_class_of_operation default drawing_language default show_context_mode default
-  label_xy 341 88
-msg 130050 synchronous
-  from durationcanvas_ref 129666
+  label_xy 196 170
+reflexivemsg 130050 synchronous
   to durationcanvas_ref 129922
-  yz 102 3005 explicitmsg "WyswietlKwote(monety: money, banknoty: money, produkt:int)"
+  yz 253 2025 explicitmsg "sprawdzBanknoty(banknoty: money)"
   show_full_operations_definition default show_class_of_operation default drawing_language default show_context_mode default
-  label_xy 556 85
-reflexivemsg 130306 synchronous
-  to durationcanvas_ref 130178
-  yz 149 2025 explicitmsg "WyswietlPozostalaKwote(monety: money, banknoty: money, produkt:int)"
-  show_full_operations_definition default show_class_of_operation default drawing_language default show_context_mode default
-  label_xy 632 135
-reflexivemsg 130562 synchronous
-  to durationcanvas_ref 130434
-  yz 120 2025 explicitmsg "SprawdzMonety(monety: money)"
-  show_full_operations_definition default show_class_of_operation default drawing_language default show_context_mode default
-  label_xy 304 106
-reflexivemsg 130818 synchronous
-  to durationcanvas_ref 130690
-  yz 179 2025 explicitmsg "SprawdzBanknoty(banknoty: money)"
-  show_full_operations_definition default show_class_of_operation default drawing_language default show_context_mode default
-  label_xy 294 165
+  label_xy 186 239
 end
diff --git a/models/134786.diagram b/models/134786.diagram
new file mode 100644
index 0000000..75ab92b
--- /dev/null
+++ b/models/134786.diagram
@@ -0,0 +1,38 @@
+format 224
+
+classinstance 128002 class_ref 156628 // Klient
+  name ""   xyz 62 4 2000 life_line_z 2000
+classinstance 128130 class_ref 135042 // PodajnikKontroler
+  name ""   xyz 164 21 2000 life_line_z 2000
+classinstance 128258 class_ref 156756 // AutomatKontroler
+  name ""   xyz 346 25 2000 life_line_z 2000
+durationcanvas 128386 classinstance_ref 128258 // :AutomatKontroler
+  xyzwh 390 100 2010 11 59
+  overlappingdurationcanvas 129026
+    xyzwh 396 128 2020 11 25
+  end
+end
+durationcanvas 128514 classinstance_ref 128130 // :PodajnikKontroler
+  xyzwh 207 100 2010 11 25
+end
+durationcanvas 128770 classinstance_ref 128002 // :Klient
+  xyzwh 73 115 2010 11 25
+end
+msg 128642 synchronous
+  from durationcanvas_ref 128386
+  to durationcanvas_ref 128514
+  yz 100 2015 explicitmsg "wydajProdukt(numer: int)"
+  show_full_operations_definition default show_class_of_operation default drawing_language default show_context_mode default
+  label_xy 244 86
+msg 128898 synchronous
+  from durationcanvas_ref 128514
+  to durationcanvas_ref 128770
+  yz 115 2020 explicitmsg "wydajProdukt(numer: int)"
+  show_full_operations_definition default show_class_of_operation default drawing_language default show_context_mode default
+  label_xy 85 101
+reflexivemsg 129154 synchronous
+  to durationcanvas_ref 129026
+  yz 128 2025 explicitmsg "potwierdzPlatnosc(monety: money, banknoty: money, produkt: int)"
+  show_full_operations_definition default show_class_of_operation default drawing_language default show_context_mode default
+  label_xy 258 114
+end
diff --git a/models/134914.diagram b/models/134914.diagram
new file mode 100644
index 0000000..d48b73f
--- /dev/null
+++ b/models/134914.diagram
@@ -0,0 +1,42 @@
+format 224
+
+classinstance 128002 class_ref 156628 // Klient
+  name ""   xyz 63 4 2000 life_line_z 2000
+classinstance 128130 class_ref 156756 // AutomatKontroler
+  name ""   xyz 246 17 2000 life_line_z 2000
+classinstance 128770 class_ref 134786 // KasetaKontroler
+  name ""   xyz 599 22 2000 life_line_z 2000
+durationcanvas 128258 classinstance_ref 128002 // :Klient
+  xyzwh 74 92 2010 11 40
+end
+durationcanvas 128386 classinstance_ref 128130 // :AutomatKontroler
+  xyzwh 290 92 2010 11 73
+end
+durationcanvas 128898 classinstance_ref 128770 // :KasetaKontroler
+  xyzwh 640 98 2010 11 67
+end
+msg 128514 synchronous
+  from durationcanvas_ref 128258
+  to durationcanvas_ref 128386
+  yz 92 2015 explicitmsg "anulujZakup(produkt: int)"
+  show_full_operations_definition default show_class_of_operation default drawing_language default show_context_mode default
+  label_xy 123 77
+msg 128642 return
+  from durationcanvas_ref 128386
+  to durationcanvas_ref 128258
+  yz 114 2015 explicitmsg "pieniadze = anulujZakup(produkt: int)"
+  show_full_operations_definition default show_class_of_operation default drawing_language default show_context_mode default
+  label_xy 99 105
+msg 129026 synchronous
+  from durationcanvas_ref 128386
+  to durationcanvas_ref 128898
+  yz 98 2020 explicitmsg "zwrocPieniadze(monety: money, banknoty: money, produkt: int))"
+  show_full_operations_definition default show_class_of_operation default drawing_language default show_context_mode default
+  label_xy 317 81
+msg 129154 return
+  from durationcanvas_ref 128898
+  to durationcanvas_ref 128386
+  yz 154 2020 explicitmsg "kwota = zwrocPieniadze(monety: money, banknoty: money, produkt: int))"
+  show_full_operations_definition default show_class_of_operation default drawing_language default show_context_mode default
+  label_xy 304 138
+end
diff --git a/models/160980_2.d b/models/160980_2.d
new file mode 100644
index 0000000..7c1354f
--- /dev/null
+++ b/models/160980_2.d
@@ -0,0 +1,89 @@
+format 224
+
+pseudostatecanvas 128084 pseudostate_ref 128084 // initial 
+   xyz 81 92 2000
+end
+statecanvas 128212 state_ref 128212 // Produkt Wybrany
+  
+  xyzwh 31 201 2000 115 33
+end
+statecanvas 128340 state_ref 128340 // Produkt Oplacony
+  
+  xyzwh 372 451 2000 117 33
+end
+statecanvas 128468 state_ref 128468 // Karta Wczytana
+  
+  xyzwh 568 207 2000 137 33
+end
+pseudostatecanvas 128596 pseudostate_ref 128212 // final Produkt Wydany
+   xyz 417 609 2000
+end
+pseudostatecanvas 128980 pseudostate_ref 128340 // final Zakup Anulowany
+   xyz 247 688 2000
+end
+statecanvas 129876 state_ref 128596 // Oczekiwanie na Zaplate
+  
+  xyzwh 248 203 2000 149 33
+end
+note 134356 "wrzuconaKwota < cenaProduktu "
+  xyzwh 266 26 2006 123 49
+note 134484 "srodkiNaKoncie < cenaProduktu"
+  xyzwh 644 498 2000 119 47
+note 134612 "wrzuconaKwota >= cenaProduktu"
+  xyzwh 270 365 2000 103 65
+transitioncanvas 128724 transition_ref 128084 // wydajProdukt
+  
+  from ref 128340 z 2001 label "wydajProdukt" xyz 443 539 2001 to ref 128596
+  write_horizontally default show_definition default drawing_language default
+end
+transitioncanvas 128852 transition_ref 128212 // pobierzSrodki
+  
+  from ref 128468 z 2001 label "pobierzSrodki" xyz 458 331 2001 to ref 128340
+  write_horizontally default show_definition default drawing_language default
+end
+transitioncanvas 129108 transition_ref 128340 // odrzucTransakcje
+  
+  from ref 128468 z 2001 label "odrzucTransakcje" max_width 14 xyz 644 476 2001 to point 634 640
+  line 134228 z 2001 to point 636 700
+  line 129236 z 2001 to ref 128980
+  write_horizontally default show_definition default drawing_language default
+end
+transitioncanvas 129748 transition_ref 128468 // wybierzProdukt
+  
+  from ref 128084 z 2001 label "wybierzProdukt" xyz 10 145 2001 to ref 128212
+  write_horizontally default show_definition default drawing_language default
+end
+transitioncanvas 130644 transition_ref 128724 // oplacProdukt
+  
+  from ref 128212 z 2001 label "oplacProdukt" xyz 159 199 2001 to ref 129876
+  write_horizontally default show_definition default drawing_language default
+end
+transitioncanvas 132052 transition_ref 129108 // wrzucGotowke
+  decenter_begin 906
+  decenter_end 134
+  
+  from ref 129876 z 2001 label "wrzucGotowke" max_width 14 xyz 288 77 2001 to point 379 94
+  line 132180 z 2001 to point 263 93
+  line 132308 z 2001 to ref 129876
+  write_horizontally default show_definition default drawing_language default
+end
+transitioncanvas 132564 transition_ref 129236 // przylozKarteDoTerminala
+  
+  from ref 129876 z 2001 label "przylozKarteDoTerminala" xyz 424 199 2001 to ref 128468
+  write_horizontally default show_definition default drawing_language default
+end
+transitioncanvas 132692 transition_ref 129364 // wrzucGotowke
+  decenter_begin 865
+  decenter_end 75
+  
+  from ref 129876 z 2001 label "wrzucGotowke" max_width 14 xyz 278 351 2001 to point 378 443
+  line 134740 z 2001 to ref 128340
+  write_horizontally default show_definition default drawing_language default
+end
+transitioncanvas 132820 transition_ref 129492 // anulujZakup
+  decenter_begin 79
+  
+  from ref 129876 z 2001 label "anulujZakup" xyz 185 449 2001 to ref 128980
+  write_horizontally default show_definition default drawing_language default
+end
+end
diff --git a/models/models.prj b/models/models.prj
index 4c42828..41e3cbb 100644
--- a/models/models.prj
+++ b/models/models.prj
@@ -1,7 +1,7 @@
-format 223
+format 224
 "models"
-  revision 20
-  modified_by 84 "Szogunek"
+  revision 21
+  modified_by 2 "luksz"
 
 
   
@@ -1280,5 +1280,85 @@ format 223
 	end
       end
     end
+
+    sequencediagram 134530 "1-1-wyborKoduProduktuPakowanego"
+      sequencediagramsettings end
+      overlapping_bars size A4
+    end
+
+    class 134530 "KlawiaturaKontroler"
+      visibility package 
+      cpp_decl ""
+      java_decl ""
+      php_decl ""
+      python_2_2 python_decl ""
+      idl_decl ""
+      explicit_switch_type ""
+      mysql_decl ""
+      
+    end
+
+    class 134658 "ListaProduktow"
+      visibility package 
+      cpp_decl ""
+      java_decl ""
+      php_decl ""
+      python_2_2 python_decl ""
+      idl_decl ""
+      explicit_switch_type ""
+      mysql_decl ""
+      
+    end
+
+    sequencediagram 134658 "1-2-wprowadzenieMonetyBanknotu"
+      sequencediagramsettings end
+      overlapping_bars size A4
+    end
+
+    class 134786 "KasetaKontroler"
+      visibility package 
+      cpp_decl ""
+      java_decl ""
+      php_decl ""
+      python_2_2 python_decl ""
+      idl_decl ""
+      explicit_switch_type ""
+      mysql_decl ""
+      
+    end
+
+    class 134914 "EkranKontroler"
+      visibility package 
+      cpp_decl ""
+      java_decl ""
+      php_decl ""
+      python_2_2 python_decl ""
+      idl_decl ""
+      explicit_switch_type ""
+      mysql_decl ""
+      
+    end
+
+    sequencediagram 134786 "1-3-odbiorProduktu"
+      sequencediagramsettings end
+      overlapping_bars size A4
+    end
+
+    class 135042 "PodajnikKontroler"
+      visibility package 
+      cpp_decl ""
+      java_decl ""
+      php_decl ""
+      python_2_2 python_decl ""
+      idl_decl ""
+      explicit_switch_type ""
+      mysql_decl ""
+      
+    end
+
+    sequencediagram 134914 "1-4-anulowanieZakupu"
+      sequencediagramsettings end
+      overlapping_bars size A4
+    end
   end
 end