let sca = 150;

let red1 = 76;

let green1 = 161;

let blue1 = 175;

​

function setup() {

  createCanvas(400, 400);

}

​

function draw() {

​

  background(0);

  translate(width / 2, height / 2);

  for (var a = 0; a < TWO_PI; a += 0.13) {

    stroke(red1,green1,blue1);

    // fill(red1,green1,blue1);

    strokeWeight(2);

    k=k*int(random(0,10));

    sca+=1

    var r = sca * cos(k * a);

    var x = r * cos(a);

    var y = r * sin(a);

    rect(0,x,y,0);

    red1-=1;

    green1-=1;

    blue1-=1;

    if (sca > 150){

      sca = 0;

    }

    if(red1 < 44){

      red1 = 76;

    }

    if(green1<62){

      green1 = 161;

    }

    if(blue1<80){

      blue1 = 175;

    }

    if(k>10){

      k=5;

    }

  }

​

}