<div class="x3rt-box">
  <div class="x3rt-word" style="font-size:5em;">
    <div class="x3rt-step x3rt-step1">
      <div class="x3rt-red">X</div><div>3rt</div>
    </div>
    <div class="x3rt-step x3rt-step2">
      <div class="x3rt-green">x</div><div>3rt</div>
    </div>
    <div class="x3rt-step x3rt-step3">
      <div>x3</div><div class="x3rt-red">R</div><div>t</div>
    </div>
    <div class="x3rt-step x3rt-step4">
      <div>x3</div><div class="x3rt-green">r</div><div>t</div>
    </div>
    <div class="x3rt-step x3rt-step5">
      <div>x3r</div><div class="x3rt-red">T</div>
    </div>
    <div class="x3rt-step x3rt-step6">
      <div>x3r</div><div class="x3rt-green">t</div>
    </div>
  </div>
</div>