zeropad - pads a number with ceros
Mipey, thanks for mentioning that, was looking for an expression like this, but must have missed it. Will be useful in the future.
Updated .capx with zeropad: FootballTimer2.capx
I would use timescale for testing, since it allows the fast forwarding events to check that it all works (without staring at the timer for a minute). Change it to 'wallclocktime' if you want to.