Not resetting the source code of puck after remove the battery?

Just type save() on the left-hand side after uploading your code - job done!

Everything should resume where it left off - but if you want to run some code specifically at startup, either do E.on('init', function() { your code }) or create a function called onInit - which will get called automatically, for example:

function onInit() {
  digitalPulse(LED1,1,1000);
}

(you can also turn on save on send in the IDE's options, but that's more advanced - I'd just use
the save() method for now)