XOR in 256 characters or less

This is a submission for DEV Computer Science Challenge v24.06.12: One Byte Explainer.

Explainer

XOR is like a magic trick where we have two numbers. When we combine them using XOR, we get a new number. We can use XOR again on the new number and one of the originals and get the other original back. It's a simple way to mix and unmix numbers.