This is an afk frog light build that I now make usually under ground to hide it. It is three levels totaling 17 blocks tall. The top level has magma spawners which water pushes the magmas into the powdered snow killing them to the smallest of cubes. The smallest cubes go under the powdered snow into another water wash pushing them into the frog level. The frogs then turn the smaller cubes into frog lights which wash into a hopper collection going down to the third level to a chest. The build needs to be in three biomes necessary to get the different colored lights. I made the front out of glass for picture
purposes, I usually brick it in also. You can make the entrance to meet your needs. When I saved the schem I was standing on the top center edge on the glass side so one could dig down however many blocks deep you want it to be and it is facing West.