Alright everyone. I was going to post this in one of the post's I had asked on what to use for the Dot Room, but I wanted others to view this too as more of a how-to. Anyway, I bought black fitted sheets at walmart for $2.69each!!!! (Im sure they have regular sheets for the same price, but my store didnt have them) I had to cut them myself to make them completely flat, but it's fast and easy. Anyway, instead of the normal, painting cirlces on, I bought neon duck tape. The tape doesn't stick to the sheets, but if you hot glue it does. The tape roles are only $2.39 each, and last a while. Any questions, ask. As far as long lasting dot room walls go, i'm not sure since todays only my first day creating them...but its fast, easy, and cheap! I'll have pictures soon.