How do I add a delay in a JavaScript loop? - From https://stackoverflow.com/questions/3583724/how-do-i-add-a-delay-in-a-javascript-loop

delay-loop.js

(function myLoop (i) {          
   setTimeout(function () {   
      alert('hello');          //  your code here                
      if (--i) myLoop(i);      //  decrement i and call myLoop again if i > 0
   }, 3000)
})(10);                        //  pass the number of iterations as an argument