save project

snake.py

@@ -54,9 +54,11 @@ while True:
     else:
         y += 30
     position.append((x, y))
-    if x == apple_x and y == apple_y:    
-        apple_x = random.randint(0,660)
-        apple_y = random.randint(0,480)
+    if x == apple_x and y == apple_y:   
+        num1=random.randint(1,22) 
+        num2=random.randint(1,16) 
+        apple_x = num1 * 30 - 30
+        apple_y = num2 * 30 - 30
 
     position.pop(0)
     # 将背景图画上去