[erlang-questions] Timer

[Sten Kvamme]

I'm working on a vector graphics  animation in Ex11. What is the best  
way to implement acceleration (exponential time delay)? Is it best  
done in C? The timer module doesn't work on my Mac OS X. timer:sleep 
() gives me the following error: Error in process <0.42.0> with exit  
value: {undef,[{timer,sleep,[[500]]},{trigger,for,4},{trigger,trig,1}]}

Erlang is new for me, so there is possibly some simple solution.

Thanks,
Sten