Evergreen countdown timer that remembers the visitor (similar to Deadline Funnel)

<!-- Google Fonts link to use the "Inter" font --><link href="https://fonts.googleapis.com/css2?family=Inter:wght@400&display=swap" rel="stylesheet"><div class="timer-container">  <div id="countdown">--:--:--</div></div><style>  /* Style for the timer container */  .timer-container {    display: flex;    justify-content: center;    align-items: center;    height: 30px;    background-color: #dc0000;    width: 100%;  }  /* Timer styling */  #countdown {    font-size: 1.5rem;    font-family: 'Inter', sans-serif;    color: white;    font-weight: 700;  }</style><script>  // Set the timer duration (20 minutes = 20 * 60 * 1000 ms)  const timerDuration = 20 * 60 * 1000; // 20 minutes in milliseconds  const countdownEl = document.getElementById('countdown');  const redirectUrl = "https://getsalesrocket.com/end";  const localStorageKey = "countdownEndTime";  const resetTimeDuration = 24 * 60 * 60 * 1000; // 24 hours in milliseconds (Change this variable for different reset times)  // Function to start the countdown  function startCountdown(endTime) {    const interval = setInterval(() => {      const currentTime = new Date().getTime();      const distance = endTime - currentTime;      if (distance <= 0) {        clearInterval(interval);        localStorage.removeItem(localStorageKey); // Clear the saved end time        window.location.href = redirectUrl; // Redirect when time is up      } else {        const minutes = Math.floor((distance % (1000 * 60 * 60)) / (1000 * 60));        const seconds = Math.floor((distance % (1000 * 60)) / 1000);        // Display the timer in "MM:SS" format        countdownEl.innerHTML = `${minutes.toString().padStart(2, '0')}:${seconds.toString().padStart(2, '0')}`;      }    }, 1000);  }  // Get saved end time from localStorage  function getSavedEndTime() {    const savedEndTime = localStorage.getItem(localStorageKey);    if (savedEndTime) {      const currentTime = new Date().getTime();      if (currentTime < savedEndTime) {        return savedEndTime;      } else {        localStorage.removeItem(localStorageKey); // Time has passed, clear the old data      }    }    return null;  }  // Main function to handle the timer logic  function handleTimer() {    const savedEndTime = getSavedEndTime();    if (savedEndTime) {      startCountdown(parseInt(savedEndTime, 10));    } else {      const endTime = new Date().getTime() + timerDuration;      localStorage.setItem(localStorageKey, endTime);      startCountdown(endTime);    }  }  // After resetTimeDuration, allow access to the original page  function checkAccess() {    const savedEndTime = localStorage.getItem(localStorageKey);    if (savedEndTime) {      const timePassed = new Date().getTime() - parseInt(savedEndTime, 10);      if (timePassed > resetTimeDuration) {        localStorage.removeItem(localStorageKey); // Allow access after resetTimeDuration      }    }  }  // Run access check and then handle the timer  checkAccess();  handleTimer();</script>