Submarine

Splashery stretches a drumhead over this Splash's outline, twelve inches across, and finds the ways it can ring. Its lowest is 616.9 Hz, 85 cents sharp of D5, 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 dive; then it surfaces and raises its periscope.

A submarine is a ship that can travel underwater. To dive, it lets seawater into big tanks, making it heavy enough to sink; to come back up, it blows the water out with compressed air. A periscope, a long tube with mirrors inside, lets the crew see above the surface while the submarine stays hidden below.

Tap it to dive: the periscope drops, bubbles rush from the hull and it sinks under the water. Then it rises back to the surface and raises its periscope again. Pick its color 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.