I've tried:
#loopdb @countdown {#if (%val<%int( %eval( @timers.%key/2))) {#addk timercolour {%key=yellow}}}
#loopdb @countdown {#if (%val<%int( %eval( @timers.%key*(1/2)))) {#addk timercolour {%key=yellow}}}
#loopdb @countdown {#if (%val<%int( %eval( %db(@timers,%key)*(1/2)))) {#addk timercolour {%key=yellow}}}
#loopdb @countdown {#if (%val<%int( %eval( %db(@timers,%key)/2))) {#addk timercolour {%key=yellow}}}
None seem to work.
I'm obviously doing something wrong.
I just want it to change any value in the database to yellow if it's below half.