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Description
This is a result of a cellular automaton simulation I'm working on, and I thought it made a cool looking icon c:

That's all you need to know unless you're interested in the details

Rules of the simulation:
Green (1) becomes white (-1)
White becomes green, unless it's next to green, in which case it becomes black (0)
Black remains black, unless it's next to green, in which case it becomes green
The rule is reversible, so I ran a simulation starting with the padlock icon and let it scatter, and then I applied the inverse rule to get the reverse effect.

The rules of the inverse simulation simply swap (1) for (-1) wherever they appear in the original rule.

A few more details about it can be found here (please note that the repository hasn't been updated in a while and contains a few mistakes, as well as missing a few important details)

Description
This is a result of a cellular automaton simulation I'm working on, and I thought it made a cool looking icon c:

That's all you need to know unless you're interested in the details

Rules of the simulation:
Green (1) becomes white (-1)
White becomes green, unless it's next to green, in which case it becomes black (0)
Black remains black, unless it's next to green, in which case it becomes green
The rule is reversible, so I ran a simulation starting with the padlock icon and let it scatter, and then I applied the inverse rule to get the reverse effect.

The rules of the inverse simulation simply swap (1) for (-1) wherever they appear in the original rule.

A few more details about it can be found here (please note that the repository hasn't been updated in a while and contains a few mistakes, as well as missing a few important details)