if me_destroy_index == 0:
life_num -= 1
me.reset()
pygame.time.set_timer(invincible_time, 3 * 1000)
if enemies_down and not me.invincible:
me.active = false
for e in enemies_down:
e.active = false
elif event.type == invincible_time:
me.invincible = false
pygame.time.set_timer(invincible_time, 0)
在飛機一條命被撞了之後，我們設定乙個3秒的無敵狀態
在reset後，呼叫計時器，就不會呼叫
if enemies_down and not me.invincible:裡面的 me.active = false
則飛機無敵，然後3秒後呼叫elif event.type == invincible_time:
me.invincible = false，關閉計時器
然後呼叫if enemies_down and not me.invincible:
recorded = false
if not recorded:
recorded = true
with open("record.txt", "r") as f:
record_score = int(f.read())
if score > record_score:
with open("record.txt", "w") as f:
f.write(str(score))
先把recored設定為false，這樣不用一局遊戲瘋狂讀檔存檔
節省資源，然後再把recored設定為true
開啟檔案record.text
如果此局分數比以往高，則存檔入record.txt檔案
record_score_text = score_font.render("best : %d" % record_score, true, (255, 255, 255))
screen.blit(record_score_text, (50, 50))
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