breathing forest light

let forêt = [];
let nArbre;
let t;
let c;
function setup() {
  c = 600;
  cnv = createCanvas(c, c);
  nArbre = int(random(5, 40));
  for (let i = 0; i < nArbre; i++) {
    forêt.push(new Arbre(height / 3 + (i * height) / (1.5 * nArbre), i));
  }
  c = createVector(random(10, 60), random(10, 60), random(10, 60));
  noStroke();
}
function draw() {
  background(c.x, c.y, c.z);
  t = frameCount / 1000;
  for (let i = 0; i < nArbre; i++) {
    forêt[i].display();
  }
}

class Arbre {
  constructor(dy, i) {
    this.x = random(0, c);
    this.thickness = random(15, 25);
    this.dy = dy;
    this.bend1 = random(2, 10);
    this.bend2 = random(2, 10);
    this.brouillard = [];
    this.fCount = int(random(50, 100 + 5000 / nArbre));
    for (let k = 0; k < this.fCount; k++) {
      this.brouillard[k] = createVector(
        random(50, c / 2),
        random(2, 5),
        random(20, 100)
      );
    }
    this.shape = [];
    for (let k = 0; k <= this.dy; k++) {
      this.shape[k] = createVector(
        this.x +
          (this.thickness / this.bend2) *
            sin(k / this.brouillard[30].x + this.dy) +
          (this.thickness / this.bend2 / 2) *
            sin(k / this.brouillard[20].x - this.dy) -
          (this.thickness / this.bend1) * cos(this.dy - k / 50),
        k
      );
    }
  }
  display() {
    fill(c.x, c.y, c.z);
    beginShape();
    for (let i = 0; i <= this.dy; i++) {
      vertex(this.shape[i].x, this.shape[i].y);
    }
    for (let i = this.shape.length - 1; i >= 0; i--) {
      vertex(this.shape[i].x - this.thickness - i / 80, this.shape[i].y);
    }

    endShape();
    fill(255, 255, 255, 2);
    for (let i = 0; i < this.fCount; i++) {
      circle(
        this.x + this.brouillard[i].x * sin(t + this.x + i * this.dy),
        this.dy -
          i / this.bend1 -
          this.thickness * 5 * abs(sin(t + i + this.x)),
        this.brouillard[i].z
      );
      circle(
        this.x + this.brouillard[i].x * sin(t + this.x + i * this.dy),
        this.dy -
          i / this.bend1 -
          this.thickness * 7 * abs(sin(t + i + this.x)),
        this.brouillard[i].z
      );
    }
  }
}
function mousePressed() {
  forêt = [];
  setup();
  draw();
}