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“It’s a quincunx for probability distribution analysis,” says Siraj.

Ainsley’s gemstones and Siraj’s quincunx both earned an honorable mention.

In fact, a few of them wind up at the far edges of the quincunx’s bottom rack.

The crossed bones reference the four directions of the Aztec calendar meeting together at the heart of the world, called the quincunx; that’s the knob.

“The Quincunx of Heaven runs low, and ’tis time to close the five ports of knowledge,” he writes in his conclusion to “The Garden of Cyrus,” his essay on the geometric patterns of plantations in the ancient and modern world.