Overusing Adjacent Semicircles

It's a thing of beauty, really. The semicircle. A shape so pure, so elegant, so semicircle-superposition-optional that it's a wonder it doesn't have its own semicircle-superposition-superposition-optional.

But, alas, we're here for the adjacent part.

You see, the adjacent part is where the magic happens. The semicircle is the unsung hero of design, the overusing of which is a virtue.