Titanic Toilet Paper

I found this idea on Pinterest and decided to recreate it myself.  While my boyfriend took a nap, I grabbed some sharpies and got to work.  He woke up sometime later, and the house echoed with his laughter when he discovered my art. 

I've been dying to do this in a public restroom, but so far, I've only come across rolls without the perforations between squares.  *sigh*