A pixel ghost sheds glowing soul-wisps that float away.
This is the whole thing. Phluxel runs it on every cell, every step — the animation is what happens when you repeat it.
PARAM _rate = 16; PARAM _dim = 4; S.G > 180 & S.R < 170 ? [255, {SAT, (S.R * 0.9)}, {SAT, (S.G - _dim)}, {SAT, (S.B * 0.97)}] : (G > 150 & R < 170 ? [BASE] : (BASE.G > 199 & RN < _rate ? [255, 90, 244, 215]))
Paste it into the Rule Editor, or pick Rising Wisps (BASE) from the template list and skip the typing.
Phluxel runs in the browser as a demo, and the free desktop edition has every feature with a watermark on exports.
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