The Pulsar is a specific period-3 oscillator. It is the most common period-3 oscillator and frequently emerges from random starting conditions. It is a stunningly symmetric pattern that looks like a pulsating star.
Despite its large size (15x15 bounding box), the Pulsar is surprisingly common. It evolves from a simple seed pattern of two T-tetrominoes or a specific line of cells. Its evolution is stable, predictable, and mesmerizing to watch.
The Pulsar goes through three distinct phases before repeating. It is a strict oscillator, meaning it returns to its exact initial state without any displacement (unlike spaceships). It's a favorite among Game of Life enthusiasts for its visual appeal.
Click "Open in Simulator" to see this pattern evolve.