let step = 0.01

let x = 0.01

let r = 2.5

​

function setup() {

  createCanvas(windowWidth, windowHeight);

  background(0);

  strokeWeight(1)

  stroke(255,20)

}

​

function draw() {

  translate(0, (height / 2)-350)

  for (let i = 0; i < 1000; i++) {

    x = Logistic(x, r)

    point(frameCount/2, x * 700)

  }

  r += 0.00125

  if (r > 4.5) {

    noLoop()

  }

}

​

function Logistic(x, r) {

  return r * x * (1 - x)

}