A tiny snippet to orchestrate cumulative timeouts in a more intuitive schedule pattern.

events_scheduler.js

(function(){
  var run_events = function(schedule, complete){
    var running_total_duration = 0;
    schedule.forEach(function(thing, index){
      setTimeout(function(){
        thing.event();
        if(index === schedule.length - 1){
          complete(running_total_duration, schedule);
        }
      }, running_total_duration);
      running_total_duration += (1000 * thing.duration);
    });
  };

  var events = [
    { 
      duration: 1,
      event: function(){
        console.log('event 1');
      }
    },
    { 
      duration: 2,
      event: function(){
        console.log('event 2');
      }
    },
    { 
      duration: 1,
      event: function(){
        console.log('event 3');
      }
    }
  ];

  run_events(events, function(){
    console.log(arguments);
  });
})();