Lighthouse

Splashery stretches a drumhead over this Splash's outline, twelve inches across, and finds the ways it can ring. Its lowest is 483.6 Hz, 136 cents flat of C5, 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 to switch the light off or on.

A lighthouse is a tower with a bright light at the top that guides ships at night and warns them away from rocks and dangerous coasts. Each lighthouse flashes in its own pattern and is painted in its own stripes or colors, so sailors can tell which one they are looking at, by night or by day. Many use a special lens, invented by Augustin Fresnel in the 1820s, that gathers the light into a strong beam.

This lighthouse starts with its beam sweeping around. Tap to switch the light off, and tap again to switch it on. Pick the color of its stripes 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.