Coundown timer on LCD

[chrisshortys]

off the top of my head as im at work atm i would say that the result would remain zero as my old mentor told me that pbp doesnt do negative numbers?

Now thats where i believe the coding which reads:
If seconds <0 then
Seconds = 59 ?
Now that keeps the numbers rolling but i cannot see were the code which adjusts the next number sequence works.
I already have the hundredths of secs running downwards and everytime it reachs 0 it goes back to 99 i just dont see how to get it to affect the seconds.

[Kamikaze47]

as far as pbp is concerned, if temp is a byte variable and temp=0, then temp-1 = 255.