Basic, but pretty fun! Two things I would suggest, one is maybe making it so the same color can't show up twice in a row, and two I personally (who as far as I know am not colorblind in a significant way), found the blue and the purple to be a *little* too similar to determine sometimes when they were the gate. I could naturally tell when they were next to each other but in a vacuum I got a bit confused sometimes. Great work overall!