I have an animated version of this on @CodePen.
I had to simplify it for a.singlediv.com because animating background-position like this was making the browser chug... a-chugga.
🚆 codepen.io/lynnandtonic/pen/GRqJdKG
Video description: animation of a traditional train entering a tunnel and emerging a futuristic train in space traveling along a rainbow
Lynn Fisher
@lynnandtonic