A Pen by Mark Lee.

Fibonacci-circles.markdown

Fibonacci circles

A Pen by Mark Lee on CodePen.

License.

script.js

function fibonacci(n) {
  var fib = []; 
  for(var a=0, b=1, c=0, i=0; i<n; a=b, b=c, i++){
      fib.push(a);
      c = a+b;
  }
  return fib;
}
function makeDivs(arr){
  arr.forEach(function(val){
    var div = document.createElement('div');
    document.body.appendChild(div);
    div.style.width = val + 'px';
    div.style.height = val + 'px';
  });
}

makeDivs(fibonacci(18));

style.css

body{background: #000;margin:0;padding:0;overflow:hidden}
div{
  background: rgba(255,255,255, .6);
  position: absolute;
  border-radius: 50%;
}