Tiny Planet

Splashery stretches a drumhead over this Splash's outline, twelve inches across, and finds the ways it can ring. Its lowest is 281.8 Hz, 71 cents flat of D4, the nearest tine on the comb. The next fifteen are its overtones, and each one draws its own figure: sand gathers on the lines that stay still.

Tap it to sweep night across it. Pick a planet under Planet in the Splash tab.

A tiny, made-up planet built by the computer from a sphere and a palette of planet colors: blue seas, green land and white clouds for Earth, rusty deserts and white polar caps for Mars, gray craters for the Moon, and banded storms for Jupiter and Neptune. It is a tribute to the very first version of Splashery.

Tap it and a band of night sweeps across it while any clouds race once around it. Day and night happen because a planet spins: at any moment, the half facing its star has day and the other half has night. Earth turns once about every 24 hours, Jupiter in under 10. Pick Earth, Mars, the Moon, Jupiter or Neptune under Planet in the Splash tab.

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.