I suppose you could rework this to actually encode the message in the shape much like a qr code. You could do it by having the first 9 characters be done by just moving around the 3 sides of the triangle, then the next set would have a dot in the middle, and then the next set would have a line through the middle, etc. You could then write that line-by-line or in a spiral or something.

Neat to think about though. And, unlike QR codes they look sufficiently sci-fi.