Draw once and the page repeats you around the centre, six
times over, mirrored. A scribble becomes a snowflake; a straight line
becomes a wheel. Nothing leaves this tab — no upload, no account, no
drawing kept anywhere but in this window. Save writes a PNG from this
browser straight to your downloads.
The rest of the family is that way.
How it works
Keyboard: arrows move the cursor, hold Shift to
move further, Space lowers and lifts the pen, Enter starts a new stroke.
Touch, mouse and pen work directly on the drawing. Changing the symmetry
or the window size redraws from the stroke log, so nothing is lost.