I wanted the back of the dress to be different from the front, so I made another pattern, with similar elements (tesselated octagons) but also added squares. I made the overall shapes smaller and the colour all black. I wanted the strap that went from the front to the back to be yellow and stand out, creating the illustion that it continued from the front onto the back. I then lazer cut those two pieces out and sewed them together. I made the dress one strapped, and then I attached an elastic piece to the other shoulder to help it stay up on someone's body.