save project

snake.py

@@ -54,16 +54,27 @@ while True:
         y -= 30
     else:
         y += 30
+    if x>630:
+        x=0
+    elif x<0:
+        x=630
+    elif y>450:
+        y=0
+    elif y<0:
+        y=450
     position.append((x, y))
+    if (x,y) in position[0:-1]:
+        break 
     if x==apple_X and y==apple_Y:
         apple_X=30*randint(0,21)
         apple_Y=30*randint(0,14)
         Score+=10
     else:
         position.pop(0)
-    if x>630 or x<0 or y>450 or y<0:
-        over_txt=over.render("Game Over",True,(0,0,0))
-        break
+    # if x>630 or x<0 or y>450 or y<0:
+    #     over_txt=over.render("Game Over",True,(0,0,0))
+    #     break
+
     out_score="Score:"+str(Score)
     # 将背景图画上去   
     screen.blit(background, (0, 0))
@@ -80,6 +91,7 @@ while True:
     # 刷新画面
     pygame.display.update()
     FPSCLOCK.tick(ticktime)
+over_txt=over.render("Game Over",True,(0,0,0))
 screen.blit(over_txt,(175,200))
 for i in range(6):
     pygame.display.update()