let treeWidth;

  let verticalLeafSpacing;

  let horizontalLeafSpacing;

​

function setup() {

  createCanvas(400, 400);

  //Randomize tree variables

  treeHeight=random(220,320);

  treeWidth=random(25,45);

  verticalLeafSpacing=random(30, 45);

  horizontalLeafSpacing=random(30, 50);

}

​

function draw() {

  background(24);

  fill(0,250,0);

  drawTree(200, 200);

}

​

//Draw tree

function drawTree(x, y){

  //Draw trunk

  rectMode(CENTER);

  fill(130, 80, 50);

  rect(x, y+30, treeWidth, treeHeight); 

  //Draw leaves

  fill(0, 250, 0);

  for (let i=0; i<5; i++) {

    drawTriangle(x, y-treeHeight/2 + 50+verticalLeafSpacing*i, treeWidth*2+i*horizontalLeafSpacing, 50+i*5);

  }

}

​

//Draw triangle

function drawTriangle(x, y, width, height) {

  triangle(x-width/2, y, x, y-height, x+width/2, y);

}