let numParticles = 100;

​

function setup() {

  createCanvas(windowWidth, windowHeight);

  noStroke();

  fill(255, 150); // Semi-transparent white

}

​

function draw() {

  background(0); // Black background

  // Add a point to the trail at the current mouse position

  trail.push(createVector(mouseX, mouseY));

​

  // If the trail gets too long, remove the oldest point

  if (trail.length > numParticles) {

    trail.shift();

  }

​

  // Draw and update the particles

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

    let sparkleSize = random(5, 20); // Vary the size of the sparkle

    fill(255, 150); // Random sparkling color

    ellipse(trail[i].x, trail[i].y, sparkleSize, sparkleSize);

  }

}

​