Particle-class

//Particle class
class Particle {
  constructor(position) {
    this.acceleration = createVector(0, 0.05);
    this.velocity = createVector(random(-1, 1), random(0, 1));
    this.position = position.copy();
    this.lifespan = 255;
    this.r = 6
    this.col = color(128, 128, 128, this.lifespan);
    this.strokeCol = color(255, 255, 255, this.lifespan);
  }
  run(){
    this.update();
    this.display();
  }
  //Function to update the position of the particle
  update(){
    this.velocity.add(this.acceleration);
    this.position.add(this.velocity);
    this.lifespan -= 2;
  }
  //Function to display the particles
  display(){
    stroke(this.strokeCol);
    strokeWeight(2);
    fill(this.col);
    ellipse(this.position.x, this.position.y, this.r*2, this.r*2);
  }
  //Check if the lifespan is still positive
  isDead(){
    return this.lifespan < 0;
  }
  //to change the color of the particles
  changeColor(){
    this.col = color(252, 150, 17);
    this.strokeCol = color(165, 100, 14);
  }
  //checking if the beams intersect the particles
  intersects(other){
    var d = dist(this.x, this.y, other.x, other.y);
    if (d < this.r + other.width){
      return true;
    } else {
      return false;
    }
  }
}