Portfolio 404 page graffiti easter egg

In the process of redesigning my portfolio I thought I'd have to make something special for the 404 page.

I've came up with the idea of a blank wall where anyone could practice his handstyle skills.

It's done mainly using a HTML5 canvas, but I've used webgl on top of it to obtain the little brick texture blend mode effect. It's also useful for the transition effect when you leave the page to go back on the main website.

Go try it here: https://www.martin-laxenaire.fr/404