text: let elapsedTime = 0;
  
  function countAndDisplay(){
      // increment the counter
      elapsedTime++;
  
      // display the time elapsed on the page
      let el = document.querySelector('#countHeading');
      el.innerText = `Elapsed time since the page opened: ${elapsedTime}`;
  }
  
  setInterval(countAndDisplay, 1000);
  