save project

snake.py

@@ -55,7 +55,8 @@ while True:
     if x==apple_x and y==apple_y:
         a=random.randint(1,22)
         b=random.randint(1,16)
-        
+        apple_x=a*30-30
+        apple_y=b*30-30
     position.append((x, y))
     position.pop(0)
     # 将背景图画上去