Wrap a meander border around a circle, render just the motif on its own, or save your own reusable motif.
Split is how many times the pattern repeats around the circle.
"-"-separated lengths: the first is the bottom line, each one after is a further move turned 90° outward from the last, e.g. "3-2-2-1-1" is the classic key motif.
Shortcut for an evenly-spaced pattern with this many turns (--turns 4 = pattern "3-2-2-1-1").
A small library of named, reusable motifs.
Direction letters (u/d/l/r = out/in/back/forward) each followed by a length, with no separators -- more expressive than Pattern since moves don't have to keep turning the same way. "sX,Y" is a straight line X right and Y up (diagonals too); "hX,Y" / "vX,Y" is a quarter circle there, setting off horizontally / vertically. Append "+x,y" and more moves for a separate shape starting x right of and y up from the start, e.g. "u5r7d2l4d2r2d1r3+2,1r2u1l2d1" adds a closed 2×1 box.
Letters, numbers, - and _ only. Saved shapes show up under Saved shape above for everyone, permanently -- there's no way to remove one from here once saved.
Click points on a grid to trace the motif, plus any separate shapes that repeat along with it -- it's turned into a pattern string for you.
Flatten scales how far the pattern's outer/inner lines sit from the original line, as two numbers "A B" (e.g. "2 3" for two-thirds the usual depth) -- leave blank for no change. Unit only matters for "Just the motif".
Optional. Letters, numbers, - and _ only. A named pattern is saved under Saved shape for everyone, permanently, the next time you generate -- leave it blank to just use the drawing.