Cycling GMOD Backgrounds?

So, I made these nine backgrounds and I named them “background01.vtf”, “background02.vtf”, “background03.vtf”, etc. I put them all in the materials/console folder. It only shows the first one though, and doesn’t cycle through. How can I fix this?

Here are the pictures if you want to see them
http://img683.imageshack.us/i/39690756.png/
http://img59.imageshack.us/i/39562695.png/
http://img171.imageshack.us/i/32125499.png/
http://img46.imageshack.us/i/34988505.png/
http://img526.imageshack.us/i/96169376.png/
http://img24.imageshack.us/i/19183209.png/
http://img18.imageshack.us/i/98652177.png/
http://img13.imageshack.us/i/52234682.png/
http://img139.imageshack.us/i/64760440.png/

Some script in Gmod stops this. I don’t think it is possible, sadly.