Gutting Unstuck Day 21 - Invent a new Getting Unstuck prompt LOOK FOR THE GLOW When a stack is running it has a glowing edge. If your code is misbehaving then watch for this and you'll see which stacks are running at each moment in time.
I wasn't getting anywhere. I had an idea about trying clones if you were stuck: "send in the clones," but it wasn't right. I went for the oldest trick in the book, and slept on it. This is the result. I hope you find it useful.