pyramid

function setup() {
  var canvas = createCanvas(500, 500);
  canvas.parent('sketch');
  colorMode(HSB);
  background(98);
  stroke(0);
  strokeWeight(1);

  fill(98);
  triangle(width / 5, 3 * height / 5, width / 2, height / 4, width / 2, 3 * height / 4);
  fill(0);
  triangle(width / 2, 3 * height / 4, width / 2, height / 4, 4 * width / 5, 3 * height / 5);
}