save project

q/main.py

+import pygame
+import sys
+from pygame.locals import *
+from random import *
+class Ball(pygame.sprite.Sprite):
+    def __init__(self,image,position,speed,bg_size):
+        pygame.sprite.Sprite.__init__(self)
+        self.image==pygame.image.load(image).convert_alpha()
+        self.rect=self.image.get_rect()
+        self.rect.left,self.rect.top=position
+        self.speed=speed
+        self.width,self.height=bg_size[0],bg_size[1]
+    def move(self):
+        self.rect=self.rect.move(self.speed)
+        if self.rect.right<0:
+            self.rect.left=self.width
+        elif self.rect.left>self.width:
+            self.rect.right=0
+        elif self.rect.bottom<0:
+            self.rect.top=self.height
+        elif self.rect.top>self.height:
+            self.rect.bottom=0
+def main():
+    pygame.init()
+    ball='gray_ball.png'
+    bg='backgound.png'
+    running=True
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