countdown timer with touchable numbers

So I’m trying to create something like this
alt text

Where I’ll have 4 sets of two digits. I want to be able to click/touch any set and stop it from counting down. The others will continue to count until they are touched.

I’m not really sure where to start on this. Like, would I make an animated texture or a sprite map? Or can I pull this off with a typeface? I would really appreciate a general overview of how I might pull this off. Thanks!

for a four digit number put each number in an array. Then reference each number to a specific gui label. Use the method onmousedown to check if the number is being touched. If it is save the current number to a variable and pause it. Then when the mouse is done touching it it will continue the countdown.