GameMonkeyScript/gmsrc/doc/tutorial/2-continuing/scripts/states_04.gm

global state_advance = function()
{
	print("Leaving cover and advancing");
};

global state_decide_action = function()
{
	print("I have to decide on a next action");
};

global state_hiding = function()
{
	print("Behind cover, waiting to advance");
	sig = block("advance");
	if (sig == "advance")
	{
		stateSet( awake );
	}
};

global init_state = function()
{
	stateSet( state_hiding );
};

tid = thread( init_state );
sleep(1);
// Signal isn't thrown, tell this thread to change state
print("Cover explodes!");
stateSetOnThread( tid, state_decide_action );