Swirl Mover

let particles = [];

let leader = []

let a = 0

​

function setup() {

  createCanvas(windowWidth, windowHeight);

      colorMode(HSB, 255)

  background((150 + 200) / 2, 255, 255);

  let x = -width / 10

  let y = - height / 10

  for (let j = 0; j < 50; j++) {

  for (let i = 0; i < 100; i++) {

    let particle = {

      position: createVector(x, y)

    };

​

    particle.color = color(map(particle.position.x + particle.position.y, 0, width + height, 0, 255), random(200, 255), random(100, 255), 20);

    //colorMode()

    particles.push(particle);

    x = x + ((width + width/5) / 50)

  }

    leader.push(createVector(random(width), random(height)))

    x = - width / 10

    y = y + ((height + height / 5) / 50)

  }

}

​

function draw() {

   //background(255, 1);

let speedRate = map(cos(frameCount / 100), -1, 1, 100, 5000)

  for (let i = 0; i < particles.length; i++) {

    let p = particles[i].position;

    let pP = particles[(i - 1 + particles.length) % particles.length].position; // wrap around to the last particle

    if (i > 0) {

      let d = dist(p.x, p.y, (pP.x + leader[0].x) / 2, (pP.y + leader[0].y) / 2);

      p.x += sin(d) * random([random(5), 0.5]); // adjusting the movement scale for better visualization

      p.y += cos(d) * random([random(5), 0.5]); // adjusting the movement scale for better visualization

    } else {

      let d = dist(p.x, p.y, leader[0].x, leader[0].y);

      p.x += sin(d) * random([random(5), 0.5]); // adjusting the movement scale for better visualization

      p.y += cos(d) * random([random(5), 0.5]); // adjusting the movement scale for better visualization

    }

    stroke(particles[i].color); // Set stroke color to particle's color

    strokeWeight(10)

    point(p.x, p.y);

  if (frameCount % map(cos(a / 20), -1, 1, 75, 500) < map(sin(a / 10), -1, 1, 10, 50)) {

a = a + 0.00001

    }   else {

          strokeWeight(40)

    colorMode(RGB)

    stroke(255, 255, 0)

    // point(leader[0].x, leader[0].y)

    }

    leader[0].x = (map(sin(a), -1, 1, 0, width) + map(noise(a), -1, 1, 0, width)) / 2

    leader[0].y = (map(cos(a), -1, 1, 0, height) + map(noise(a), -1, 1, 0, height)) / 2

​

    /* / Reset particle's position if it goes out of the canvas boundaries

    if (p.x > width + width / 5 || p.x < - width / 5 || p.y > height + height / 5 || p.y <  - height / 5) {

      let randomIndex = floor(random(1, particles.length));

      p.x = particles[randomIndex].position.x;

      p.y = particles[randomIndex].position.y;

    }

    */

  }   

​

}

​

​

​