My daughter and I designed an esolang for you. It has 6 instructions and is a stack of columns: c toggles the color, i adds a block to the active column, d duplicates the active column and pushes it onto the stack of columns (clones to the left), s pops the active column and drops it onto the next column, then l and r just shift left/right the active column.

This challenge is made for the mc86 architecture we designed for our previous CTF: https://www.youtube.com/watch?v=mqOSgJ0NM_Q

All the things you need are in this gist: https://gist.github.com/AndyNovo/eb1866333e7f8b4746a441b84d5c1e67

Author: ProfNinja and CandyNovo