LED Sign

My friend's birthday is coming up, and she is a 14-year-old astronomy nerd. I decided to make her this sign, not only for a gift but to get the experience as a beginner to the world of LED's. It says "Astronomers Only". (Her nickname is "Sidereal" [astronomy term] and mine is "Fluffy. What a great nickname) :) The switch is at the top, all you do is loop one wire through the other. Sorry the green LED seems to cancel out all the others. :)