If you don't want to go searching in the script, read on!
First, Go to the stage and put on your "Detective Gear"! :P
1. Click on the Cabinet in the upper left.
2. Click on the garbage can, near the center of the play.
3. Click on the book and the bottom-left.
4. Click on the flowers [Make sure not the vase!] in the top-right.
5. Click on the painting on the bottom-right wall.
IN THAT ORDER!

6. Open the vault on the wall where the painting was.

Now you have the awesome ruby pin! I love it, Don't you?
~Me12101 lime cheats president
PS: Lime Cheats turning 1 year old on July 21st..Wanna Party?