How to make a countdown timer progression bar?

Hi I want to make a countdown timer and also have a visual progression bar of it in game. Could you guide me to the right direction?

Thanks

I would def. search on this one. It has been answered a number of times.
Try here for a google custom search engine for everything Unity:
Looking for Answers? Use the Google Custom Search Engine!

In the barest minimum:
You will need a variable to hold the total time to be counted down, a variable to hold the current time in the count down, a way to start the counter, and code that is executed when it’s done. Lastly, you will need a way to take the current time in the count down and represent it graphically, but there are many different ways to accomplish this… As I said, I’d search for the answer and read thru the options and find one that suits you best.