<h1 data-heading="YES"><span data-heading="YES">YES</span></h1>

<!-- Removed content editable temporarily in support of the australian postal vote for same sex marriage --->
$pink: #d61c5b;
$red: #f1573f;
$orange: #feb213;
$green: #6abc4e;
$blue: #2599d8;

html, body {
  background: linear-gradient(45deg, rgba(240,249,255,1) 0%,rgba(203,235,255,1) 47%,rgba(161,219,255,1) 100%);
  width: 100%;
  height: 100%;
}

h1 {
  font-family: 'Oswald', sans-serif;
  text-transform: uppercase;
  font-size: 20vw;
  text-align: center;
  line-height: 1;
  margin: 0;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  position: absolute;
  color: $blue;
  
  &:before,
  &:after, 
  span:before, 
  span:after {
    content: attr(data-heading);
    position: absolute;
    overflow: hidden;
    left: 0;
  }
  
  &:before {
    color: $pink;
    height: 34%;
    z-index: 5;
  }
  
  &:after {
    color: $red;
    height: 50%;
    z-index: 4;
  }
  
  span {
    &:before {
      color: $orange;
      height: 66%;
      z-index: 3;
    }
    
    &:after {
      color: $green;
      height: 80%;
      z-index: 2;
    }
  }
}

View Compiled
/*
var span = document.querySelector("span");

span.addEventListener("input", function() {
  var text = this.innerText;
  this.setAttribute("data-heading", text);
  this.parentElement.setAttribute("data-heading", text);
});*/

External CSS

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External JavaScript

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