save project

snake.py

@@ -55,8 +55,11 @@ while True:
         y += 30
     position.append((x, y))
     if x==apple_x and y==apple_y:
-        apple_x = random.randomint(0,660)
-        apple_y = random.randomint(0,480)
+        a= random.randomint(0,660)
+        b=random.randomint(0,480)
+        apple_x = a*30-30
+        apple_y = b*30-30
+    else:
     position.pop(0)
     # 将背景图画上去
     screen.blit(background, (0, 0))