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<html>
<head>
  <meta charset="utf-8">
  <title>JS Number Pattern 29 - Try It</title>
</head>
<body>
  <h1>Mirror Number Pattern (Middle Spaces)</h1>
  <p>Edit <code>size</code> and click Run.</p>
  <pre id="output"></pre>
  <script>
    const size = 5;
    let result = "";
    for (let i = 1; i <= size; i++) {
      let line = "";
      for (let j = 1; j <= size; j++) {
        line += (j <= i) ? String(j) : "  ";
      }
      for (let k = size; k >= 1; k--) {
        line += (k > i) ? "  " : String(k);
      }
      result += line.trimEnd() + "\n";
    }
    document.getElementById("output").textContent = result;
  </script>
</body>
</html>

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JavaScript Number Pattern 29 (Try It)