save project

snake.py

@@ -49,8 +49,9 @@ while True:
     if (x,y)==(apple_x,apple_y):
         apple_x = 30*random.randint(0,20)
         apple_y = 30*random.randint(0,16)
-    pos.append((x,y))
+    else:   
         pos.pop(0)
+    pos.append((x,y))        
     screen.blit(background,(0,0))
     screen.blit(snake_head,pos[-1])
     screen.blit(food,(apple_x,apple_y))