float volume = 0.5;
integer LtSwitch = FALSE;

key    open_sound  = "8eae9c2b-3caa-477c-964d-c3752c23eddb";

default
{
touch_start(integer total_number)
{
if(LtSwitch == FALSE)
{
LtSwitch = TRUE;
llTriggerSound(open_sound, volume);
llShout(1701, "On");
}
else
{
LtSwitch = FALSE;
llTriggerSound(open_sound, volume);
llShout(1701, "Off");