var particles = [];

let accelerationFactor = 0.1; // Acceleration multiplier for controlling speed

let repulsionRadius = 100; // Radius around the mouse for repulsion

​

function setup() {

  createCanvas(600, 600);

  noStroke();

}

​

function draw() {

  background(0);

​

  // Add particles periodically

  if (frameCount % 2 == 0) {

    particles.push(new Particle(random(10, 45), random(30, 45)));

    particles.push(new Particle(random(195, 220), random(195, 220)));

  }

​

  for (var i = particles.length - 1; i > 0; i--) {

    var p = particles[i];

    p.update();

    p.repulse(); // Apply repulsion force if near the mouse

    p.display();

​

    // Remove particle if outside bounds or faded out

    if (p.isOutside() || p.a <= -10) {

      particles.splice(i, 1);

    }

  }

​

  // Control the acceleration factor dynamically with arrow keys

  if (keyIsDown(UP_ARROW)) {

    accelerationFactor += 0.01; // Increase acceleration with up arrow

  }

  if (keyIsDown(DOWN_ARROW)) {

    accelerationFactor = max(0, accelerationFactor - 0.01); // Decrease with down arrow

  }

}

​