snake moves along a grid, aligned with food item

BlankProjectTemplate/src/Food.py

@@ -28,5 +28,5 @@ class Food():
     #  @param screenSize is the size of the screen
     def redraw_food(self, x, y, location,screenSize):
         if(abs(x - location[0]) < 15 and abs(y - location[1]) < 15):
-            location[0] = randint(0, screenSize - self.size)
-            location[1] = randint(0, screenSize - self.size)
+            location[0] = randint(0, grid_length - 1) * self.size
+            location[1] = randint(0, grid_length - 1) * self.size

BlankProjectTemplate/src/Gameplay.py

@@ -3,16 +3,13 @@
 #  @brief implements gameplay and connects the different components of the game
 #  @date 11/09/2018
 
-
 from random import randint
 from Snake import *
 from Food import *
 
-# One size for all blocks created for snake
-size = 20 
 
-#velocity and score
-vel = 10
+
+
 global a
 
 a = 0
@@ -22,12 +19,7 @@ snake_loc = []
 #variable to increment snake's length, initially it would be 1
 snake_length = 1
 
-#initial x and y coordinates of the snake
-x = randint(0,screenSize - size)
-y = randint(0, screenSize - size)
-
-
-speed = 40
+speed = 30
 
 # 0 gives (- direction)
 # 1 gives (+ direction)
@@ -39,12 +31,15 @@ score = 0
 
 # parameters for initializing food on the screen
 food_location = []
-food_x = randint(0,screenSize - size)
-food_y = randint(0,screenSize - size)
+food_x = randint(0, grid_length - 1) * size
+food_y = randint(0, grid_length - 1) * size
 food_location = [food_x, food_y]
 
-##initialize snake
+##initialize snake and draw snake body somewhere on the screen
+print(x/size, y/size)
+
 snake = Snake(size, 0, 20, 0)
+pygame.draw.rect(win, red , [x,y, size, size])
 food = Food(size)
 
 
@@ -73,12 +68,13 @@ while run:
 
     #Snake moving depending on axis and direction
     if (snake.axis):
-        y += vel*snake.direct
+        y += (size)*snake.direct
     else:
-        x += vel*snake.direct
+        x += (size)*snake.direct
 
-
-    
+    print("x: ",x,"y: ",y)
+    print("food x: ",food_location[0],"food y: ",food_location[1])
+   
     #Boundary conditions for snake hitting window edge
     if x < 0:
         #x = 0

BlankProjectTemplate/src/init.py

@@ -4,6 +4,7 @@
 #  @date 11/09/2018
 
 import pygame
+from random import randint
 
 #initializing PyGame and setting game window dimensions
 pygame.init()
@@ -16,3 +17,11 @@ white = (255,255,255)
 red = (255,0,0)
 blue = (0,0,255)
 black = (0,0,0)
+
+# One size for all blocks created for snake
+size = 20
+grid_length = screenSize/size
+
+#make initial position sit within the grid
+x = randint(0, grid_length) * size
+y = randint(0, grid_length) * size