createCanvas(windowWidth, windowHeight);

  angleMode(DEGREES);

​

}  

​

function draw() {

  background(255,255,255);

  push();

  translate(width/2,height/2);

  drawTree(0,0,-90,50,5,10);

  pop();

}

​

​

​

​

​

​

​

​

​

​

function drawTree(x1,y1,direction,length,depth,angle) {

  if (depth !== 0){

    let x2 = x1 + length * cos(direction);

    let y2 = y1 + length  * sin(direction);

    stroke(0,0,0)

    strokeWeight(0.5*depth);

    line(x1,y1,x2,y2);  

    drawTree(x2,y2,direction-angle,length,depth-1,angle);

    drawTree(x2,y2,direction+angle,length,depth-1,angle);

  }

}