save project

snake.py

@@ -56,9 +56,12 @@ while True:
         y += 30
     position.append((x, y))
     if x==sbx and y==sby:
-        sbx=random.randint(0,660)
-        sby=random.randint(0,480)
-    position.pop(0)
+        S=random.randint(1,22)
+        B=random.randint(1,16)
+        sbx=S*30-30
+        sby=B*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