Untitled

function fakeBin(x){
  let newArr = Array.from(x);
  for (let i = 0; i <= newArr.length; i += 1) {
 if (Number(newArr[i]) < 5) {
   newArr.splice(i, 1, '0');
 } 
 if (Number(newArr[i]) >= 5) {
   newArr.splice(i, 1, '1');
 }
  }
  return newArr.join('');
}