s and t are integers.
int s, t;
Its apparently a simplified C or C++.
Edit: Ha, its been running for a few hours now, and it is counting down with negative numbers from -59, -58... -11, -10, -90, -80... -20, -10, -010. Could this have anything to do with the control/connection of the LCD?
Edit2: I added 't' to the display. It counts 1 - 60, then 609, 619,... 699, 70, 71... Buuuut, 's' now seems to display as expected.
Strange stuff.
When I have it simply print t without calculating s, it counts as expected. That seems to affect t... Digging now.