Fern

Splashery stretches a drumhead over this Splash's outline, twelve inches across, and finds the ways it can ring. Its lowest is 464.5 Hz, 6 cents flat of B♭4. The next fifteen are its overtones, and each one draws its own figure: sand gathers on the lines that stay still.

Tap it to unroll the fiddleheads into new fronds. Hands-on: brush the fronds; they sway back.

Ferns are some of the oldest plants on Earth: they grew long before the dinosaurs, and they still grow in shady woods today. They have no flowers or seeds. Instead they spread by spores, tiny specks that grow in brown dots under their leaves, which are called fronds.

Each new frond starts as a tight coil called a fiddlehead, because it looks like the curled end of a violin. Tap it and the two fiddleheads in the middle unroll into new fronds, joint by joint from the base to the tip, then roll back up. Pick a Seed in the Splash tab for a different fern. With ✋ Hands-on on, brush the fronds and they bend after your finger; let go and they spring back and sway.

Made in Splashery. Its code is MIT.

This link opens it in the Playground. To put it on your own page, add the element and one script tag. Every option.