save project

snake.py

@@ -57,9 +57,12 @@ while True:
      
     position.append((x, y))
     if x==apple_x and y==apple_y:
-        apple_x=random.randint(0,660)
-        apple_y=random.randint(0,480)
-    position.pop(0)
+        apple_x=random.randint(1,22)
+        apple_y=random.randint(1,16)
+        apple_x=apple_x*30-30
+        apple_y=apple_y*30-30
+    else:   
+        position.pop(0)
     # 将背景图画上去
     screen.blit(background, (0, 0))
     # 将贪吃蛇的头画上去