Try to make ‘R BBBB RRR BBBB RRRRRR’
My puzzle is like level 49 in the book exept you have to finish it off with 6 reds not 4
(1R 4B 3R 4B 6R)
My solution is a bit too complex for my liking so i have put out a challenge for someone to do better. Good Luck!
You can ONLY USE 3 BLUES (switches)
And unlimited for every other part.