Create()
{
        moving = true;
        start-script SoundLoop();
}

SoundLoop()
{
	while(1)
	{
		if(moving)
		{
			play-sound("tread", 36);
		}
		sleep 3852;
	}
}

StartMoving()
{
	moving = 1;
}

StopMoving()
{
	moving = 0;
}

----------------------------------------
SOUND.TDF:

[QUANT]
{
  tread=tread;
}