diff --git a/tractor.py b/tractor.py
index 6716e0c..8ba6bc4 100644
--- a/tractor.py
+++ b/tractor.py
@@ -17,16 +17,19 @@ from colors import *
 from sprites import *
 
 class Tractor(pygame.sprite.Sprite):
-    def __init__(self, field):
+    def __init__(self, field, position):
         super(Tractor, self).__init__()
         self.surf = pygame.Surface((WIDTH, HEIGHT))
         self.surf = tractor_img_0
-        self.position = field.position
+        self.position = position
+        self.field = field
         self.rect = self.surf.get_rect(
             topleft=((MARGIN + WIDTH) * self.position[0] + MARGIN, (MARGIN + HEIGHT) * self.position[1] + MARGIN))
         self.direction = [1, 0]
+        self.field[self.position[0]][self.position[1]].tractor_there = True
         
     def move(self):
+        self.field[self.position[0]][self.position[1]].tractor_there = False
         self.rect.move_ip(self.direction[0]*(WIDTH + MARGIN), self.direction[1]*(HEIGHT + MARGIN))
         self.position[0] += self.direction[0]
         self.position[1] += self.direction[1]
@@ -48,7 +51,9 @@ class Tractor(pygame.sprite.Sprite):
         if self.rect.right > SCREEN_WIDTH-MARGIN:
                 self.rect.right = SCREEN_WIDTH-MARGIN
         
+        self.field[self.position[0]][self.position[1]].tractor_there = True
 
+    
     def rotate_right(self):
         if self.direction == [1, 0]:
             self.direction = [0, 1]