Draw a spinner in your console.

consoleSpinner.js

var timer;

function showSpinner() {
    var i = 0; 
    var css = "font-size: 32px; color: red;";
    clearInterval(timer);
    timer = setInterval(
    function () {
      console.clear();
      // console.log(timer);
      i++;
      switch(i%4) {
        case 0: console.log("%c |", css); break;
        case 1: console.log("%c /", css); break;
        case 2: console.log("%c –", css); break;
        case 3: console.log("%c \\", css); break;
        default: break;
      }
    }
    , 50);
}
function stopSpinner() {
  clearInterval(timer);
}
showSpinner();