Well there are a few ones, maybe one for ekko, a jungle irelia maybe (so F would flash the colour of chilling smite), a spirit godyr one based on the standard layout, but with each stance flashing the stance color on the keyboard and the border flashing the four different stance colors (again with f being chilling smite) and then a nice minecraft one, if you need to know the keys I use most often its WASDE~ and left shift (go crazy :D)
If you dont want to make all of those (I wouldn't lol) the two I would prefer the most are the spirit godyr one followed by the minecraft one