save project

snake.py

@@ -54,10 +54,14 @@ while True:
     else:
         y += 30
     if x==ax and y==ay:
-        ax=random.randint(0,600)
-        ay=random.randint(0,480)
+        sx=random.randint(1,22)
+        sy=random.randint(1,15)
+        ax=sx*30-30
+        ay=sy*30-30
+    else:
+        position.pop(0)
+    
     position.append((x, y))
-    position.pop(0)
     # 将背景图画上去
     screen.blit(background, (0, 0))
     # 将贪吃蛇的头画上去
@@ -67,7 +71,7 @@ while True:
         screen.blit(body, position[i])
 
     # 将果实画上去
-    screen.blit(food, (ax, ay))
+    screen.blit(food, (ax,ay))
     # 刷新画面
     pygame.display.update()
     FPSCLOCK.tick(3)
\ No newline at end of file