function changeColor() {
  var check = document.getElementById('checkBox').checked;
  function colorChange() {
    if (value = red) {
        check.parentNode.style.background = "red";
    }
    if (value = yellow) {
        check.parentNode.style.background = "yellow";
    }
    if (value = green) {
        check.parentNode.style.background = "green";
    }
  }