createCanvas(400, 400);

​

}

​

​

function draw() {

  background(220);

    drawTriangles();

}

​

function drawTriangles()

{

  let angle = PI/8;

  let num =1;

  let x1 = 100,  x2 = 200,  x3 = 300,  y1 = 200,  y2 = 230,  y3 = 200;

  for (let i=0; i< 20; i++){ 

  fill(random(20*i, 40*i,50*i))

  triangle(x1*i, y1*i, x2*i, y2*i, x3*i, y3*i);

  rotate(angle);

  num+=1;

  angle += PI/8;

  }

​

}