Perspective Shift

/*Downloaded from https://www.codeseek.co/matt-west/perspective-shift-kXALLa */
.container {
  position: relative;
  width: 400px;
  margin: 100px auto;
}

.box {
  width: 400px;
  height: 200px;
  background: red;
  position: absolute;
  top: 40px;
  left: 0;
  z-index: 3;
}
.box:nth-child(2) {
  background: blue;
  width: 340px;
  height: 160px;
  top: 20px;
  left: 30px;
  z-index: 2;
}
.box:nth-child(3) {
  background: green;
  width: 280px;
  height: 140px;
  top: 0;
  left: 60px;
  z-index: 1;
}

/*Downloaded from https://www.codeseek.co/matt-west/perspective-shift-kXALLa */
$(function() {

  var boxTwo = document.querySelector('.box:nth-child(2)');
  var boxThree = document.querySelector('.box:nth-child(3)');

  if (window.DeviceOrientationEvent) {
    
    window.addEventListener("deviceorientation", function(event) {
      alert('okay');
      var xValue = Math.round(event.gamma);
      var yValue = Math.round(event.beta);
      var Rotation = Math.round(event.alpha);

      alert(xValue);

    }, true);

  }

});