text: function timer() {
      let timer;
      let isTicking = false;
  
      $('#start-timer').on('click', function () {
          if (isTicking === false) {
              timer = setInterval(startTimer, 1000);
              isTicking = true;
          }
      });
  
      $('#stop-timer').click(stopTimer);
  
  
      function startTimer() {
          let secondsElement = $('#seconds');
          let seconds = +secondsElement.text();
  
          let minutesElement = $('#minutes');
          let minutes = +minutesElement.text();
  
          let hoursElement = $('#hours');
          let hours = +hoursElement.text();
  
  
          if (seconds === 59) {
              secondsElement.text('00');
  
              if (minutes === 59) {
                  minutesElement.text('00');
                  hoursElement.text(formatter(hours + 1));
              } else {
                  minutesElement.text(formatter(minutes + 1));
              }
          } else {
              secondsElement.text(formatter(seconds + 1));
          }
      }
  
      function stopTimer() {
          clearInterval(timer);
          isTicking = false;
      }
  
      function formatter(element) {
          return `0${element}`.slice(-2);
      }
  }