The most important part of this design is the background. I drew a few experimental lines in my vector program and then "tiled" the square to create a seamless background, taking great care to match the lines to the exact pixel. The overall result reminded me of a fishing net so I added a few fish to complete the design. Now the pattern is finished it could seem that the fish might be "trapped" in the net... I like to think they are just swimming above it.