SCRIPT-8

README.md

This is a SCRIPT-8 cassette. Click here to boot it.

code.js

// title: Dot spiral

initialState = {
  circles: range(64)
    .map(i => ({
      a: 0,
      r: i,
      c: 7 - Math.floor(i / 8),
      d: i % 2 === 0 ? 1 : 1
    }))
}

update = state => {
  state.circles.forEach(circle => {
    circle.a += circle.d * circle.r / 4
  })
}

draw = state => {
  clear()
  
  state.circles.forEach(circle => {
    const { a, r, c } = circle
    const x = 64 + Math.cos(a * Math.PI / 180) * r
    const y = 64 + Math.sin(a * Math.PI / 180) * r
    circFill(x, y, 4, c)
  })
}