小综合--倒计时牌，设计一个具有实际应用价值的动态倒计时牌。要求目标时间（即倒计时截至时间）的年、月、日、时、分、秒和倒计时主题可以根据不同主题由用户动态设定，并且在此设定基础上在屏幕上显示距离相关主题（如奥运会）到达之时还有n年、n天和n秒（其中的三个n各不相同，且随着程序运行动态变化），以北京时间作为主要显示板块。程序中除了刚运行时给出一次当前标准时间值（或读出系统当前时间）外，在程序运行期间应在自己独立的用户时钟控制下，而不受外界输入影响和系统时间的束缚。-Little comprehensive- countdown, countdown to design a dynamic practical value. Requires that the target time (ie, the countdown ending time) of the year, month, day, hour, minute, second and countdown themes can be dynamically set by the user based on different themes, and in this setting is displayed on the screen based on distance-related topics (such as Olympic Games) as well as the arrival of the year n, n days n seconds (three of which n varies, and with the program running dynamic changes) to Beijing as the main display section. Just run the program, in addition to the current standard is given a time value (or read the current time), but during the program should be under the control of its own independent user clock, and free from outside influence and input restraint system time.