How does an atom really look?
For a long time, we pictured the electron orbiting the nucleus like a planet circling the sun.
But that model was rejected, when we discovered that the world sometimes works in yet stranger ways.
You are looking at a Quantum Probability Cloud. According to the Schrödinger Equation, electrons do not orbit the nucleus in flat circles like planets. Instead, they exist as a "cloud" of probability.
Every pearl you see represents a possible location where the electron is likely to be found. The swirling motion represents the Probability Current: a physical flow of the wave function dictated by the magnetic quantum number.