Dark Noise Flow - OpenProcessing

mySketch
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var points
var n = 2000
var angle
var w, wi, c
​
function setup() {
  createCanvas(windowWidth, windowHeight)
  background(0)
  
  initCanvas()
}
​
function draw() {
  translate(width/2, height/2)
  noFill()
  stroke(255,5)
  
  rectMode(CENTER)
  rect(0, 0, w, w)
  
  for(let i = 0; i < points.length; i++) {
    angle = noise(points[i].x / c, points[i].y / c) * TAU * c
    points[i].add(createVector(cos(angle) / b, sin(angle) / b))
    
    if(points[i].y < -wi || points[i].y > wi || points[i].x < -wi || points[i].x > wi)
      points[i] = createVector(random(-width/2,width/2), random(-height/2, height/2))
    else
      point(points[i].x, points[i].y)
  }
}
​
function initCanvas() {
  points = []
  
  w = height - 100
  wi = w/2 - 20
  c = random(100, 500)
  b = random(TAU, TAU * 2)
  
  for(let i = 0; i < n; i++) {
    points.push(createVector(random(-width, width), random(-height, height)))
  }
}
​
function mousePressed() {
  background(0)
  noiseSeed(random(100))
  initCanvas()
}