slider, magnification;

let c1, c2, c3;

​

function setup() {

  createCanvas(windowWidth - 2, 400);

  slider = createSlider(0, TWO_PI, PI / 4, 0.001);

  magnification = createSlider(35, height * 0.33, 100, 0.01);

  colorfill();

}

​

function colorfill() {

  c1 = color(random(100, 255), random(255), random(255));

  c2 = color(random(255), random(255), random(100, 255));

  c3 = color(random(255), random(100, 255), random(100, 255));

}

​

function draw() {

  background(0);

  // colorfill();

  angle = slider.value();

  stroke(c1);

  strokeWeight(2);

  translate(width / 2, height);

  branch(magnification.value());

}

​

function branch(len) {

  line(0, 0, 0, -len);

  translate(0, -len);

  if (len > 3) {

    push();

    stroke(c2);

    rotate(angle);

    branch(len * 0.67);

    pop();

    push();

    rotate(-angle);

    stroke(c3);

    branch(len * 0.67);

    pop();

  }

}