Hypnotic effect - simple actionscript help

Hey guys, just trying to rediscover some of the old AS rudiments, i’m working on a projection to be played at a dance music festival - looking at doing lots of glitchy, hypnotic flashy things.

Primarily, i’m trying to get one triangle to fade forward but in an infinite loop so we get the effect of a neverending animation.

So far i’ve created a movie clip of one triangle expanding and fading out, i want to spawn them infinitely, every 5 frames… i’m sure it can be done, but i’m having trouble with it…

cheers for any help!