GameMonkeyScript/gmsrc/doc/tutorial/2-continuing/scripts/blocking_02.gm

/*
  Basic blocking and signalling #1
*/

global thread_1 = function()
{
  block("WAKEUP");

  print("I just woke up, boy was I tired!");
  
};

// Launch thread
thread( thread_1 );
// Sleep for 1 secs then set the wakeup variable
sleep(1);

signal("WAKEUP");