Hi there! This is my first time adding lights to a Lego build. I am having an issue with the fireworks.

I did the exterior lights and the split level lighting. I tried plugging the short end of the color changing spotlight wire into the A5 board that was plugged into the fireworks and nothing happened. They didn't turn on at all.

So, I plugged the fireworks into the A5 board that connected the color changing board the the midsection spotlights. The fireworks kind of worked, but the fireworks flash at the same time as the spotlights, and the firework farthest from the plug doesn't come on at all. Did I do something totally wrong? Thanks!