save project

123,.py

+time += 1
+if time >= 60
+    r = random.randint(0,100)
+    if r > 40:
+        obstacle = block(bush,cacti,stone)
+        block_list.add(obstacle)
+    time = 0
+for prop in block_list：
+    prop.rect.x -= 8
+    screen.blit(prop.image,(prop.rect.x,prop.rect.y))
+    if prop.rect.x<=0-prop.rect.width:
+    screen.blit(prop.image,(prop.rect.x,prop.rect.y))
+    if prop.rect.x<=0-prop.rect.width:
+        prop.kill()
+pygame.display.update()
+FPS.tick(60)