Wave Circle P5.js

var theta = 0;

​

function setup() {

  createCanvas(windowWidth, windowHeight);

  background(100);

}

​

function draw() {

  theta += .2;

  background(255);

  stroke("#2234C9");

  translate(width/2, height/2);

  noFill();

  var r=250;

  for (var i=-0.5*PI;i<PI+0.5*PI;i+=0.01*PI) {

    beginShape();

      for (var j=-sin(i)*r;j<sin(i)*r+sin(i);j+=sin(i)*20) {

        curveVertex(j,cos(i)*r+sin(theta-(j/40))*abs(i*10));

      }

    endShape();

  }

}