trigger_fx()
{
fx_trigger = getent("flak_explosion", "targetname"); //trigger targetname
if(!isDefined(fx_trigger))
return;

level.fxstate = false;
soundorigin = getent("house_sound","targetname"); //get the origin
origin = fx_trigger getorigin();
while(1) {

fx_trigger waittill("trigger"); //wait untill its triggered

soundorigin playsound("building_explo"); //play the sound

//fx_trigger playsound("building_explo"); //KABOOM!
radiusDamage(origin, 500, 2000, 1000); //ouch

if(level.fxstate == false) {
level.fxstate = true;
thread loopfx("smokey01", (-136, -752, -16), 1, 0, 600); //fx location (SMOKE)
thread loopfx("flame01", (-280, -880, 11), 1, 0, 600); //fx location (SMALL FLAME)
thread loopfx("flame01", (-24, -968, 112), 1, 0, 600); //fx location (SMALL FLAME)
}
else if(level.fxstate == true) {
level.fxstate = false;
}
}
}

loopfx(fxId, fxPos, waitime, fxStart, fxStop) {
if(!isDefined(level.fxstate))
level.fxstate = true;
if(!isDefined(fxStop))
fxStop = 600;
if(!isDefined(fxStart))
fxStart = 1;
if(!isDefined(waitime))
waitime = 1;
loop_count = 0;

wait (fxStart);

while (level.fxstate && loop_count < fxStop) {
playfx(level._effect[fxId], fxPos);
loop_count++;
wait (waitime);
}