You may be surprised to know that just about any door you like can be made into sliding (bypass) closet doors. If you do not see what you're looking for here, please check out our other door pages to see if you find something there.
Solid granny square without gaps. Just keep doing into each corner. I also slip stitch to the top of the tr before starting a new round so you can't really see the joining seam. Actual pattern in comments.