Is there anyone who can program me this countdown timer?
Here you take your project
Complete and return the project ready.
There sure is someone who can do it for you: you! This is not a site where you can get people to cheat and do your homework for you. This is a site where you can get others help to learn how to program better. How about you make an effort to do it for yourself and, when you hit an issue, show us what you've done, tell us what happened and let us know exactly what the issue is.