"SQUARED OUT"

This one is weird but easy to make. I just opened a new selection. Picked some colors and flood filled twice using a linear gradient at 270 degrees. I then chose modify, contract and set the pixels to 10 and right clicked in the selection. Then again I chose modify, contract, pixels at 10 and left clicked in the selection. I then selected the second rectangle and hot waxed it. I did the same for the outside one. I then went to the colors control box and turned down the contrast and brightness. I then saved it as a new gif file.