function open_doors() // this function is called by each door
{
	//	t_door_sounds();
	if (my.swing)
	{
		if (my.angle > 0)
		{
			while (my.pan < my.skill64 + my.angle) // rotate the door
			{
				my.pan += my.speed * time_step;
					set (my, PASSABLE); // the key is passable
				wait (1);	
			}
		}		
		if (my.angle < 0)
		{
			while (my.pan > my.skill64 + my.angle) // rotate the door
			{
				my.pan -= my.speed * time_step;
					set (my, PASSABLE); // the key is passable
				wait (1);	
			}
		}		
	}
}