2-1 버튼을 눌러도 반응이 안 나타나요

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2-1 버튼을 눌러도 반응이 안 나타나요
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영화 기록하기 버튼을 누르면 홀수짝수 팝업이 떠야하는데 안 떠요!
제가 생각하기엔 hey 인식이 안되는 거 같은데 어떻게 수정해야하는지 모르겠어요~
작성한 코드 및 에러 메세지
<!doctype html>
<html lang="en">

<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">

<link href="https://cdn.jsdelivr.net/npm/bootstrap@5.0.2/dist/css/bootstrap.min.css" rel="stylesheet"
integrity="sha384-EVSTQN3/azprG1Anm3QDgpJLIm9Nao0Yz1ztcQTwFspd3yD65VohhpuuCOmLASjC" crossorigin="anonymous">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/bootstrap@5.0.2/dist/js/bootstrap.bundle.min.js"
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crossorigin="anonymous"></script>

<title>스파르타코딩클럽 | 부트스트랩 연습하기</title>
<link href="https://fonts.googleapis.com/css2?family=Gowun+Dodum&display=swap" rel="stylesheet">

  <style>
    * {
      font-family: 'Gowun Dodum', sans-serif;
    }
    .mytitle {
      background-color: green;

      width: 100%;
      height: 250px;

      background-image: linear-gradient(0deg, rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)), url("https://movie-phinf.pstatic.net/20210715_95/1626338192428gTnJl_JPEG/movie_image.jpg");
      background-position: center;
      background-size: cover;

      color: white;

      display: flex;
      flex-direction: column;
      justify-content: center;
      align-items: center;
    }
    .mytitle > button {
      width: 200px;
      height: 50px;

      background-color: transparent;
      color: white;

      border-radius: 50px;

      border: 1px solid white;

      margin-top: 10px;
    }
    .mytitle > button:hover {
      border: 2px solid white;
    }
    .mycomment {
      color: gray;   }
    .wrap {
      max-width: 1200px;
      width: 95%;
      margin : 20px auto 10px auto;
    }
    .mypost {
      max-width: 500px;
      width: 95%;

      margin: 20px auto 0px auto;

      box-shadow: 0px 0px 3px 0px;
      padding: 20px;

    }
    .mybtn {
      display: flex;
      flex-direction: low;
      justify-content: center;
      align-items: center;

      margin-top: 10px;
    }
    .mybtn > button {
      margin-right: 10px;
    }
  </style>
  <script>
    let count = 0
    function hey(){
        count += 1
        if (count % 2 == 0) {
          alert('짝수입니다!')
        } else {
          alert('짝수입니다!')
        }
    }
  </script>
</head>

<body>
  <div class="mytitle">
    <h1>내 생에 최고의 영화들</h1>
    <button>영화 기록하기</button>
  </div>
  <div class="mypost">
    <div class="form-floating mb-3">
      <input type="email" class="form-control" id="floatingInput" placeholder="name@example.com">
      <label for="floatingInput">영화URL</label>
    </div>
    <div class="input-group mb-3">
      <label class="input-group-text" for="inputGroupSelect01">별점</label>
      <select class="form-select" id="inputGroupSelect01">
        <option selected>--선택하기--</option>
        <option value="1">⭐</option>
        <option value="2">⭐⭐</option>
        <option value="3">⭐⭐⭐</option>
        <option value="4">⭐⭐⭐⭐</option>
        <option value="5">⭐⭐⭐⭐⭐</option>
      </select>
    </div>
    <div class="form-floating">
      <textarea class="form-control" placeholder="Leave a comment here" id="floatingTextarea"></textarea>
      <label for="floatingTextarea">코멘트</label>
    </div>
    <div class="mybtn">
      <button type="button" class="btn btn-dark">기록하기</button>
      <button type="button" class="btn btn-outline-dark">닫기</button>
    </div>
  </div>
  <div class="wrap">
    <div class="row row-cols-1 row-cols-md-4 g-4">
      <div class="col">
        <div class="card">
          <img src="https://movie-phinf.pstatic.net/20210728_221/1627440327667GyoYj_JPEG/movie_image.jpg"
               class="card-img-top" alt="...">
          <div class="card-body">
            <h5 class="card-title">여기에 제목이 들어갑니다</h5>
            <p class="card-text">여기엔 내용이 들어가지요.</div>
          <P>⭐⭐⭐</P>
          <P class="mycomment">여기에 코멘트가 들어갑니다.</P>
        </div>
      </div>
      <div class="col">
        <div class="card">
          <img src="https://movie-phinf.pstatic.net/20210728_221/1627440327667GyoYj_JPEG/movie_image.jpg"
               class="card-img-top" alt="...">
          <div class="card-body">
            <h5 class="card-title">여기에 제목이 들어갑니다</h5>
            <p class="card-text">여기엔 내용이 들어가지요.</div>
          <P>⭐⭐⭐</P>
          <P class="mycomment">여기에 코멘트가 들어갑니다.</P>
        </div>
      </div>
      <div class="col">
        <div class="card">
          <img src="https://movie-phinf.pstatic.net/20210728_221/1627440327667GyoYj_JPEG/movie_image.jpg"
               class="card-img-top" alt="...">
          <div class="card-body">
            <h5 class="card-title">여기에 제목이 들어갑니다</h5>
            <p class="card-text">여기엔 내용이 들어가지요.</div>
          <P>⭐⭐⭐</P>
          <P class="mycomment">여기에 코멘트가 들어갑니다.</P>
        </div>
      </div>
      <div class="col">
        <div class="card">
          <img src="https://movie-phinf.pstatic.net/20210728_221/1627440327667GyoYj_JPEG/movie_image.jpg"
               class="card-img-top" alt="...">
          <div class="card-body">
            <h5 class="card-title">여기에 제목이 들어갑니다</h5>
            <p class="card-text">여기엔 내용이 들어가지요.</div>
          <P>⭐⭐⭐</P>
          <P class="mycomment">여기에 코멘트가 들어갑니다.</P>
        </div>
      </div>
    </div>
  </div>


</body>

</html>
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