var e = $('action');

var my_home = { 
 start: function() { 
     new PeriodicalExecuter(my_home.doit, 13) // change every X seconds 
 },
 doit: function() { 
	new Effect.Pulsate('action', {pulses: 2, duration: 3, from: 0, to: 1})
  	/*new Effect.Parallel([
     	new Effect.Opacity('action', { sync: true, from: 0, to: 1 }),
  	], { 
     	duration: 2,
     	delay: 0,
		
	}) // middle*/
 }
}
Event.observe(window, 'load', my_home.doit);
Event.observe(window, 'load', my_home.start);