This animation is part of the pre-launch of a web project called trufffle, coming out in October, and was designed for its "under construction" page. The projects will mainly consist of online coded animations (SVG or HTML5 animations), and what better way to start than with an SVG animation. This animation also helped test GSAP's (Greensock) with 3D isometric illustrations and animations.

You can find the codepen here, with the great quality and original code.

Here are some images of the work process:

SVG on the left, GSAP in Javascript on the right.

I'll probably go back in and refine JS in the future to make it leaner. 

Thanks!