let factor = 1;

​

function setup() {

  createCanvas(windowWidth, windowHeight);

  r = height / 2 - 15;

}

​

function getVector(index, total) {

  const angle = map(index % total, 0, total, 0, TWO_PI);

  const v = p5.Vector.fromAngle(angle + PI);

  v.mult(r);

  return v;

}

​

function draw() {

  background("rgb(7,7,7)");

  const total = 200; //int(map(mouseX, 0, width, 0, 200));

  factor += 0.015;

​

  translate(width / 2, height / 2);

  stroke(255, 150);

  strokeWeight(0);

  noFill(0);

  ellipse(0, 0, r * 2);

​

  strokeWeight(1);

  stroke("rgb(160,230,248)");

  for (let i = 0; i < total; i++) {

    const a = getVector(i, total);

    const b = getVector(i * factor, total);

    line(a.x, a.y, b.x, b.y);

  }

}

​

​