es6 recursive generator

gistfile1.txt

var gen = function *(count){
  console.log("gen called: ", count);
  if (count < 20) 
    yield count;
  else
    yield *gen(count/2);
}
var g = gen(100);
do {
  var n = g.next();
  if (!n.done) {
        console.log("val: ", n.value);
  }
  else {
    console.log("done");
  }
} while (!n.done)