diff --git a/Interface/grid_draw.py b/Interface/grid_draw.py
index 0f74e86..ab878a2 100644
--- a/Interface/grid_draw.py
+++ b/Interface/grid_draw.py
@@ -1,33 +1,33 @@
 import sys
 import pygame
 
-class Colors():
+
+class Colors:
     BLACK = 0, 0, 0
     WHITE = 255, 255, 255
     RED = 255, 0, 0
     GREEN = 0, 255, 0
 
+
 DEFAULT_COLOR = Colors.WHITE
 
-def default_color(func):  
+
+def default_color(func):
     def wrap(*args, **kwargs):
-        if 'color' not in kwargs:
-            kwargs['color'] = DEFAULT_COLOR            
+        if "color" not in kwargs:
+            kwargs["color"] = DEFAULT_COLOR
         result = func(*args, **kwargs)
         return result
+
     return wrap
 
-class GridDraw():
-    def __init__(
-        self,
-        width = None,
-        height = None,
-        background = None
-    ):
+
+class GridDraw:
+    def __init__(self, width=None, height=None, background=None):
         self.width = width if width != None else 100
         self.height = height if height != None else 100
         self.background = background if background != None else Colors.BLACK
-        
+
         pygame.init()
         self.screen = pygame.display.set_mode((self.width, self.height))
 
@@ -38,11 +38,11 @@ class GridDraw():
         pygame.display.flip()
 
     @default_color
-    def line(self, x_1, y_1, x_2, y_2, color = None):
+    def line(self, x_1, y_1, x_2, y_2, color=None):
         pygame.draw.line(self.screen, color, (x_1, y_1), (x_2, y_2))
-    
+
     @default_color
-    def board(self, tiles_x, tiles_y, color = None):
+    def board(self, tiles_x, tiles_y, color=None):
         tiles_width = self.width / tiles_x
         tiles_height = self.height / tiles_y
 
@@ -53,5 +53,7 @@ class GridDraw():
             self.line(0, tiles_height * i, self.width, tiles_height * i, color=color)
 
     @default_color
-    def circle(self, x, y, radius, color = None):
-        pygame.draw.circle(self.screen, color, (x, y), radius)
\ No newline at end of file
+    def circle(self, x, y, color=None):
+        pygame.draw.circle(
+            self.screen, color, (x, y), 20
+        )  # TODO calculate radius (now 20) in terms of window size.
diff --git a/Interface/movement.py b/Interface/movement.py
index cbcd2c0..546c8f5 100644
--- a/Interface/movement.py
+++ b/Interface/movement.py
@@ -1,17 +1,25 @@
 import pygame
 import sys
 
-def moving_cleaner(grid_width, grid_height,tile_width,tile_height, x, y):
+
+def robot_movement(grid_width, grid_height, tile_width, tile_height, x, y):
     for event in pygame.event.get():
         if event.type == pygame.QUIT:
             sys.exit()
         if event.type == pygame.KEYDOWN:
-            if event.key == pygame.K_LEFT and x>(tile_width / 2):
+            # go left
+            if event.key == pygame.K_LEFT and x > (tile_width / 2):
                 x -= tile_width
-            if event.key == pygame.K_RIGHT and x<(grid_width-(tile_width / 2)):
+
+            # go right
+            if event.key == pygame.K_RIGHT and x < (grid_width - (tile_width / 2)):
                 x += tile_width
-            if event.key == pygame.K_UP and y>(tile_height / 2):
+
+            # go up
+            if event.key == pygame.K_UP and y > (tile_height / 2):
                 y -= tile_height
-            if event.key == pygame.K_DOWN and y<(grid_height-(tile_height / 2)):
+
+            # go down
+            if event.key == pygame.K_DOWN and y < (grid_height - (tile_height / 2)):
                 y += tile_height
-    return(x,y)
+    return (x, y)
diff --git a/Interface/vacuum_render.py b/Interface/vacuum_render.py
index e19baac..7de34a4 100644
--- a/Interface/vacuum_render.py
+++ b/Interface/vacuum_render.py
@@ -1,21 +1,33 @@
 from Interface.grid_draw import GridDraw, Colors
 import sys
 import pygame
-from Interface.movement import moving_cleaner
+from Interface.movement import robot_movement
 
-# dummy function
-def initial_draw(grid_width, grid_height):
+
+def initial_draw(grid_dimensions, board_size):
+    # window name
+    pygame.display.set_caption("AI Vacuum Cleaner")
+
+    # define array for grid
+    border_array = [["" for j in range(board_size)] for i in range(board_size)]
+
+    # set window dimension
+    grid_width = grid_dimensions
+    grid_height = grid_dimensions
+
+    # FIXME @countingthedots: please tell me what is going on there and why???
     grid = GridDraw(grid_width, grid_height)
-    tile_width = grid_width / 10
-    tile_height = grid_height / 10
+    tile_width = grid_width / board_size
+    tile_height = grid_height / board_size
     x = tile_width / 2
     y = tile_height / 2
-    radius = 15
+    radius = 20
+
+    # rendering loop
     while True:
         grid.start_draw()
-        grid.board(10, 10)
-        (x,y) = moving_cleaner(grid_width,grid_height,tile_width,tile_height, x, y)
-        grid.circle(x, y, 20, color=Colors.RED)
-        grid.end_draw() 
-        pygame.time.delay(10)  
-             
+        grid.board(board_size, board_size)
+        (x, y) = robot_movement(grid_width, grid_height, tile_width, tile_height, x, y)
+        grid.circle(x, y, color=Colors.RED)
+        grid.end_draw()
+        pygame.time.delay(10)
diff --git a/main.py b/main.py
index 2b8ee4a..a9f53f8 100644
--- a/main.py
+++ b/main.py
@@ -1,3 +1,3 @@
 from Interface.vacuum_render import initial_draw
 
-initial_draw(500, 500)
+initial_draw(500, 10)