Repeating Pop-up | sleep();

sleep-example.js

function sleep(milliseconds){
  var start = new Date().getTime();
  for (var i = 0; i < 1e7; i++){
    if ((new Date().getTime() - start) > milliseconds){
      break;
    };
  };
};

while (true){
  running = confirm("woof");
  if (running === false){
    break;
  };
  sleep(3000);
};