return {x:cx+cos(angle) * dist, y:cy+sin(angle) * dist}

}

​

function arrow(x, y, w, h, angle) {

  beginShape()

  let a = polar(x, y, angle-120, w)

  let b = polar(x, y, angle+120, w)

  let c = polar(x, y, angle, h)

  vertex(a.x, a.y)

  vertex(b.x, b.y)

  vertex(c.x, c.y)

  endShape(CLOSE)

}

​

function setup() {

  createCanvas(400, 400);

  angleMode(DEGREES)

}

​

let theta = 0 

function draw(){

  background(220);

  arrow(200, 200, 30, 120, theta)

  theta += 3

}