My Friend (Titi) and I, were in a bar at night, with house music. Suddenly he starts to bleed from one finger and then i said to him "make a draw": I gave him paper and he started drawing. So the red color it's really blood. The black color was made by me :)

So, "Blood" from the real friend's blood and "house" because the black lines were made to the sound of house music.

P.S. we call us by Titi (my friend) and Mimi (me) ahah