let vertices = []

​

function setup() {

  createCanvas(400, 400)

  colorMode(HSB, 1, 1, 1, 1)

  background(0)

  let diameter = 30

  for (let i = 0; i < NUM_VERTICES; i++) {

    let x = random(diameter, width - diameter)

    let y = random(diameter, height - diameter)

    vertices.push({x, y})

  }

}

​

function draw() {

  background(0.3, 0.03)

  for (let v of vertices) {

    v.x += random(-2, 2)

    v.y += random(-2, 2)

    fill(0.5, 0.2)

    circle(v.x, v.y, 30)

  }

}