var waveLengthOne = 125.0;

var waveLengthTwo = 90.0;

//------------------------------//

​

var pointCount = 0;

var angle = 0.0;

var amplitude = 200;

let colors = ["#01FFF4", "#FF1178", "#7CFF01"];

​

function setup() {

  createCanvas(500, 500);

  stroke(colors[0]);

}

​

function draw() {

  if(pointCount > 10000){

    noLoop();

  }

  background(20);

  noFill();

  strokeWeight(3);

  //if(frameCount % 60 == 0)

  if(frameCount % 60 > 30) 

    stroke(colors[floor(random(0, colors.length))]);

  translate(width/2, height/2);

  beginShape();  

  for(var i = 0; i < pointCount; i++){

    angle = i / waveLengthOne * TWO_PI;

    var y = sin(angle) * amplitude;

    angle = i / waveLengthTwo * TWO_PI;

    var x = sin(angle) * amplitude;

    vertex(x, y);

  }    

  endShape();

  pointCount++;

}