concrete_waitfortrigger()
{
	trigger = getent("triggerorigin","targetname");
	trigger_use = getent("blokplafond","targetname");
	concrete = getent(trigger_use.target,"targetname");
	concrete thread killpeople(trigger);
	while(1)
	{
		trigger_use waittill("trigger", player);
		concrete moveZ(-184,1);
		wait 3; 
		level.concrete_pos = "moving up";
		concrete moveZ(184,1);
		wait 3;
	}
}
killpeople(trig)
{
	level.concrete_pos = "going down";
	wait .1;
	players = getentarray("player","classname");
	while(1)
	{
		trig waittill("trigger",player);
		if(level.concrete_pos == "going down")
			player suicide();
		else break;
		wait .05;
	}
}