eaCSS = document.querySelector(".playable-css");
    var reset = document.getElementById("reset");
    var htmlCode = textareaHTML.value;
    var cssCode = textareaCSS.value;

    function fillCode() {
      editable.innerHTML = textareaCSS.value;
      section.innerHTML = textareaHTML.value;
    }

    reset.addEventListener("click", function () {
      textareaHTML.value = htmlCode;
      textareaCSS.value = cssCode;
      fillCode();
    });

    textareaHTML.addEventListener("input", fillCode);
    text