Wah! I have so much black paper. I cannot imagine to do something alike. Please encourage me 
Just go for it! If it doesn't work the first time, it's only paper 
Have fun and enjoy, once you get the hang of drawing in reverse, it's a load of fun 
Have fun and enjoy, once you get the hang of drawing in reverse, it's a load of fun Let`s see. There are a gazillion pictures waiting to be finished