var a;

let beam;

function setup() {

  createCanvas(windowWidth, windowHeight);

  angleMode(DEGREES);

  beam = new Beam(200, 10, 255, 255, 255, 255);

  background(0);

}

​

function draw() {

  a = p5.Vector.random2D();

  beam.build(a);

  beam.display();

}

​

class Beam {

  constructor(n, nob, initR, initG, initB, alph) {

    this.n = n;

    this.nob = nob; //number of beams

    this.initR = initR; //initial red

    this.initG = initG; 

    this.initB = initB;

    this.alph = alph; //initial alph

    this.arr = []; //array of vectors

  }

  // here should use static method

  build(cpos) {

    var controller = random(0, this.n);

    for (var i = 0; i < this.nob; i++) {

      this.arr[i] = p5.Vector.mult(cpos, controller);

      // this.arr[i] = cpos.mult(controller);

      this.arr[i].rotate(30 / (i - this.nob));

    }

    cpos.mult(controller);

    console.log(cpos);

  }

  display() {

    translate(width / 2, height / 2);

    for (var i = 0; i < this.nob; i++) {

      strokeWeight(2);

      stroke(this.initR, this.initG, this.initB, this.alph);

      line(0, 0, this.arr[i].x, this.arr[i].y);

    }

  }

}