​

function setup() {

  createCanvas(500, 700);

  fill(240);

  noStroke();

}

​

function draw() {

  background(50,18,18);

  let t = frameCount / 120; 

​

    //tree branch

  fill(171,78,82);

  push();

  beginShape();

  curveVertex(0,300);

  curveVertex(200,175);

  curveVertex(175,215);

  curveVertex(375,175);

  curveVertex(250,215);

  curveVertex(400,250);

  curveVertex(290,242);

  curveVertex(300,280);

  curveVertex(260,250);

  curveVertex(100,280);

  curveVertex(-30,500);

  endShape(CLOSE);

  beginShape();

  curveVertex(500,600);

  curveVertex(400,500);

  curveVertex(433,570);

  curveVertex(375,600);

  curveVertex(475,615);

  curveVertex(550,700);

​

  endShape(CLOSE);

  pop();

  //leaves

  push();

  fill(100,255,0);

  ellipse(190,210,40,20);

  ellipse(430,250,40,20);

   ellipse(320,550,20,40);

  fill(255,100,0);

  ellipse(230,170,40,20);

  ellipse(170,450,20,40);

  ellipse(300,325,20,40);

  fill(240,240,0);

  ellipse(320,400,40,20);

  ellipse(400,175,40,20);

  ellipse(280,630,40,20);

 ellipse(110,330,40,20);

​

  pop();

  for (let i = 0; i < random(5); i++) {

    autumnleaves.push(new autumnleave()); 

  }

​

  for (let leave of autumnleaves) {

    leave.update(t); 

    leave.display(); 

  }

}

​

// snowflake class

function autumnleave() {

  this.posX = 0;

  this.posY = random(-50000, 0);

  this.initialangle = random(0, 2 * PI);

  this.size = random(20,40);

  this.size2 =random(20,40);

  this.colour = color(random(100,255),random(100,255),0);

​

  this.radius = sqrt(random(pow(width / 2, 2)));

​

  this.update = function(time) {

    let w = 0.6; 

    let angle = w * time + this.initialangle;

    this.posX = width / 2 + this.radius * sin(angle);

​

    this.posY += pow(this.size, 0.5);

​

    if (this.posY > height) {

      let index = autumnleaves.indexOf(this);

      autumnleaves.splice(index, 1);

    }

  };

​

  this.display = function() {

    fill(this.colour);

    ellipse(this.posX, this.posY, this.size, this.size2);

  };

}