Example of using promise chains to delay and log messages. Uses Q Promises with setTimeout to create promise-based API delay() function.

DelayedMessages.js

/**
 * Chain 2 Delay calls together in a non-nesting fashion
 */
function myDelayedMessages() 
{
        /**
         * Delay function using Q promises and setTimeout() internally
         */
    var delay = function( duration ) 
        {
          var dfd = Q.defer();
          
          setTimeout(function () 
          {
            dfd.resolve( "Slept for "+time );
          }, time);  
          
          return dfd.promise;
        },
        /**
         * Function to wait <XX> msecs and log response to Console
         */
        waitAndLog = function( duration ) 
        {
          return function() 
          {
            return delay( duration ).then( function( msg )
                   {
                     console.log( msg );
                   });
          };
        };

    waitAndLog(1000)().then( waitAndLog(2000) ); 
}

Created as tangible thoughts to http://flippinawesome.org/2014/02/10/replacing-callbacks-with-es6-generators/#comment-15056