I found a really cool website to make acnh pattern designs online while working on a christmas sweater. It also has an option to create a tutorial for how to recreate the design in game (not always perfect, but pretty cool). You can publish your designs on there and look through what other people made.
Animal Crossing pattern design website that features a multi-tile editor, a pro design editor, and a search gallery page
Front and back are the same, left and right sleeve are mirrored.









