flashing texture

[mr.Pac Stealy]

I've been wasted for a while, but I'm back now. :D And again I've got a question. :p I'm making a map for the next LAN we're gonna have. I try to make a CTF which looks like the school we're going at. But now I want to make a jumppad. And I want that flickering texture. How is this done? Like the jumppads in Coret? I looked in Coret, but couldn't find it out. :(
And also the jumpsound which is done by the specialevent I can't work out. I trigger the specialevent with a trigger (playerproximity), but...nope, no sound at all...?:(

[Hourences]

rigjhtclick the surface you want, take surface properties, and now you can read the name and place where the texture is located in the title bar

properties special event > go to object > state or something > playsoundeffect or something, done, fill in the sound too under special event, and trigger it