arcs

function setup() {

  createCanvas(windowWidth, windowHeight);

  background(255);

  stroke(0);

  noFill();

  strokeCap(SQUARE);

}

​

function draw() {

  for(let r = 0; r < height/2; r += height/40){

    for(let i = 0; i < 4; i ++){  

​

      let s = random(100); 

      let a = random(TWO_PI);

      let b = random(PI);

      let w = random(height/80) / (max(0.01, b));

​

      stroke(s, 210);

      strokeWeight(w);

      arc(width/2,height/2,r,r,a,a+b);

    }

  }

  noLoop();

}