I landed a job to build this lively, bold thing -- an animated landing page for an IT consulting agency. Sadly the company didn't take off.
I went with vanilla js & pug for repeating elements cause I decided you don't have to cram a SPA framework everywhere, right? )
It has a growing circle, which paints over the background, lots of color-changing SVGs, an accordion, .gifs which are actually .webms to save space... Lots of stuff. You better check out the video.