>>2810133>>2810144See picrel for how to fold them (Sorry if it's shit to follow along, I never made a origami/papercraft guide before).
If you prefer a video, this one is the one I used as a guide:
https://www.youtube.com/watch?v=f0XSBHcso-8That one uses A4, there's plenty of ones for newspaper formats around too. The shape doesn't have to be exact.
Some people really hate the external flaps this design results in, if that describes (you) as well, you can either fold the flaps inside and use soil to keep them in place (as described in the picture) or use another design like
https://youtu.be/4ulmL2oUr4M?si=m8fhQkdcHr_9gvaT .
That second video design looks neater, but is less stable and unfolds easier, so I'm not a big fan of it personally.
