Run with a Pythonista 3 App.
I was inspired by the coding of the Processing.
around- 0.0 ~ 2.0
radius- 0.0 ~ 2.0
angle- 0 ~ 360
-- decrement to
angle.
- decrement to
+- increment to
angle.
- increment to
i- to console.
×- close.
Reference : Understanding Perlin Noise
