I need help

Hi guys. I know that this is for stories and all but after reading some, I thought I could get some advice on something. I've got someone tied up in my basement, and I want the floor painted red, to match the bloody skulls and other bones mounted on the wall, but whenever I collect blood in a jar, it just clots. I was wondering what blood vessel I should sever so she bleeds out really slowly. I know that wrists always make good targets, but I don't know whether that'll be slow enough that I'll cover enough of the floor dragging her around until she dies. By the way, I'm doing this to impress a girl so if you have any ideas, let me know asap. Thanks guys.

The Cyborg Pie