Hi Eng4444,

From this forum's main menu select CODE EXAMPLES. There you will find the following items:

1) Olympic Timer
2) Easy & Accurate Clocks without RTC ICs
3) Elapsed Timer Demo

Of the three, #2 is the only one that I personally have tried. But you should look at all three programs and decide which one you want to use. They are all easy to understand.

BobK