Help please count down timer...

Help please

Need a php code for a count down timer and for it to reset every 7 days from the date i start it

i.e
Time untill next Draw:  1 Day 3 Hours 58 Minutes 50 Seconds  then reset after it has finished

need it for my site http://www.siriusdave.com/bonusball/

You should use javascript instead of php, as that will let you have the clock counting down while the visitor is seeing it. Have a look here