自制倒计时定时器，时间到时触发音乐和提示。-Self-made countdown timers, time to trigger music and tips.

这是一个PPT报告演讲定时器，总是前台显示的半透明窗口，可以自己设置定时时间，定时时间到提醒的功能。-This is a PPT Presentations timer always displayed translucent front window, you can set up their own regular time, regular time to remind function.