function setup() {

  createCanvas(windowWidth,

               windowHeight);

  background(112, 221, 153);

}



function draw() {



  noStroke();

  fill(0, 128, 128, 2);



  //adding value to the x coordinate of the first point.

  triangle(150 + frameCount / 2, 75, 30, 290, 270, 290);

}