timer on multiboard?

I'm using a multiboard for my map and having a timer on top of it just looks a bit weird. I want a timer to be displayed in one of the cells on the multiboard if that's possible. I know I could set up a text something like 00:39 on it and a periodic event every second to reduce it, but I was wondering if there is a more effective solution.

Nope as far as I know the only way would to do like you said a periodic event, that sets an integer to -1 each secound, then updates the mutlbioard text.

And it looks pretty nice.