text: function attachGradientEvents() {
  
      let gradient = document.getElementById("gradient");
  
      gradient.addEventListener("mousemove", gradientMove);
      gradient.addEventListener("mouseout", gradientOut);
  
      function gradientMove(event) {
          let power = event.offsetX / (event.target.clientWidth - 1);
          power = Math.trunc(power * 100);
  
          document.getElementById("result").textContent = power + "%";
      }
  
      function gradientOut(event) {
          document.getElementById("result").textContent = "";
      }
  }