I love the color coded approach for this, but to problems for me: 1. I can't tell the difference between the pink and the purple in the formula. The text is fi

I love the color coded approach for this, but to problems for me: 1. I can't tell the difference between the pink and the purple in the formula. The text is fine, but the formula isn't. 2. I have no idea what "signal" means in the "spin your signal" so the single sentence explanation is completely useless to me. This bums me out a bit because I think there's something really great here.