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HTML 

              
                <!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Scroll-Triggered Line Drawing Animation</title>
  <style>
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }

    body {
      font-family: system-ui, -apple-system, sans-serif;
      background: #ffffff;
      min-height: 100vh;
    }

    .scroll-container {
      min-height: 300vh;
      padding: 20px;
    }

    .intro-section {
      height: 100vh;
      display: flex;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      color: #333;
      text-align: center;
    }

    .intro-section h1 {
      font-size: 2.5rem;
      margin-bottom: 1rem;
    }

    .intro-section p {
      font-size: 1.2rem;
      color: #666;
    }

    .scroll-indicator {
      margin-top: 2rem;
      animation: bounce 2s ease-in-out infinite;
    }

    @keyframes bounce {
      0%, 100% { transform: translateY(0); }
      50% { transform: translateY(10px); }
    }

    .icon-section {
      min-height: 100vh;
      display: flex;
      justify-content: center;
      align-items: center;
      padding: 50px 20px;
    }

    .icon-wrapper {
      background: #f8f9fa;
      border-radius: 20px;
      padding: 60px;
      box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
    }

    #drawable-icon {
      display: block;
      width: 256px;
      height: 256px;
    }

    /* ============================================
       LINE DRAWING STYLES
       ============================================ */
    
    #drawable-icon path:not([fill="none"]) {
      fill: transparent;
      stroke: #333;
      stroke-width: 1.5;
      stroke-linecap: round;
      stroke-linejoin: round;
    }

    /* Set up the dash array and offset for line drawing effect */
    .draw-path-1 {
      stroke-dasharray: 62;
      stroke-dashoffset: 62;
    }

    .draw-path-2 {
      stroke-dasharray: 19;
      stroke-dashoffset: 19;
    }

    /* ============================================
       SCROLL-DRIVEN ANIMATION
       ============================================ */
    
    .draw-path-1 {
      animation: draw-line linear forwards;
      animation-timeline: view();
      animation-range: entry 0% cover 40%;
    }

    .draw-path-2 {
      animation: draw-line linear forwards;
      animation-timeline: view();
      animation-range: entry 20% cover 60%;
    }

    @keyframes draw-line {
      to {
        stroke-dashoffset: 0;
      }
    }

    /* ============================================
       FALLBACK FOR UNSUPPORTED BROWSERS
       ============================================ */
    @supports not (animation-timeline: view()) {
      .draw-path-1,
      .draw-path-2 {
        animation: draw-line 2s ease-out forwards;
      }

      .draw-path-2 {
        animation-delay: 0.5s;
      }

      .fallback-notice {
        display: block !important;
      }
    }

    .fallback-notice {
      display: none;
      background: rgba(255, 193, 7, 0.15);
      border: 1px solid #ffc107;
      color: #333;
      padding: 15px 20px;
      border-radius: 8px;
      margin-bottom: 20px;
      font-size: 0.9rem;
      text-align: center;
    }

    /* ============================================
       ACCESSIBILITY: REDUCED MOTION
       ============================================ */
    @media (prefers-reduced-motion: reduce) {
      .draw-path-1,
      .draw-path-2 {
        animation: none;
        stroke-dashoffset: 0;
      }

      .scroll-indicator {
        animation: none;
      }
    }

    .end-section {
      height: 100vh;
      display: flex;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      color: #333;
      text-align: center;
    }

    .end-section h2 {
      font-size: 2rem;
      margin-bottom: 1rem;
    }

    .end-section p {
      color: #666;
    }
  </style>
</head>
<body>
  <div class="scroll-container">
    
    <!-- Intro Section -->
    <section class="intro-section">
      <h1>Scroll-Triggered Line Drawing</h1>
      <p>Scroll down to watch the icon draw itself</p>
      <div class="scroll-indicator">
        <svg width="40" height="40" viewBox="0 0 24 24" fill="none" stroke="#333" stroke-width="2">
          <path d="M12 5v14M5 12l7 7 7-7"/>
        </svg>
      </div>
    </section>

    <!-- Icon Animation Section -->
    <section class="icon-section">
      <div class="icon-wrapper">
        <div class="fallback-notice">
          ⚠️ Your browser doesn't support scroll-driven animations. Showing fallback animation instead.
        </div>
        
        <!-- Camera icon from Tabler Icons -->
        <svg
          id="drawable-icon"
          xmlns="http://www.w3.org/2000/svg"
          viewBox="0 0 24 24"
        >
          <!-- Camera body path -->
          <path
            class="draw-path-1"
            d="M5 7h1a2 2 0 0 0 2-2a1 1 0 0 1 1-1h6a1 1 0 0 1 1 1a2 2 0 0 0 2 2h1a2 2 0 0 1 2 2v9a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2V9a2 2 0 0 1 2-2"
          />
          <!-- Camera lens circle -->
          <path
            class="draw-path-2"
            d="M12 16a3 3 0 1 0 0-6a3 3 0 0 0 0 6z"
          />
        </svg>
      </div>
    </section>

    <!-- End Section -->
    <section class="end-section">
      <h2>✏️ Drawing Complete!</h2>
      <p>Scroll back up to replay the animation</p>
    </section>

  </div>
</body>
</html>
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