​

// require libraries from TotalSerialism

const Gen = TotalSerialism.Generative;

const Mod = TotalSerialism.Transform;

​

const amt = 60;

let time = 0;

​

function setup() {

  createCanvas(windowWidth, windowHeight);  

}

​

function draw() {

  background(0);

  translate(width/2, height/2);

  // spread x coordinates in array

  let posX = Gen.spread(amt, -width/2, width/2);

  // generate multiple periods of a cosine in array

  // for half the amount

  let posY = Gen.cosineFloat(amt/2, time);

  // reverse the array and create a palindrome

  posY = Mod.palindrome(Mod.reverse(posY));

  for (let i in posX){

    stroke(255);

    line(posX[i], 0, posX[i], posY[i] * height/2); 

    line(posX[i*2 % amt], 0, posX[i], posY[i] * height/2);

  }

  time += 0.01;

}