Thank a teacher with a card that writes itself on a chalkboard. Great for Teachers' Day, the last day of school, or a whole class signing off with one link.
Thank you for everything, Ms. Rao.
The link opens as a card with this message under the drawing.
Message ideas
It's free and needs no account. Every line is drawn by circles spinning on circles, worked out with a Fourier transform. See how that works.