How to setup the parallax effect

The class that triggers the parallax effect is ".rellax" and can be used to any other elements where you want to add a parallax effect.

<div class="rellax rellax-first" data-rellax-percentage="0.9" style="background-image: url('images/parallax-background.jpg');">
 </div>

The code for js that changes the speed of parallax is found in app/js/src/script.js