Initial code using Drupal 6.38

modules/system/box.tpl.php

@@ -0,0 +1,22 @@
+<?php
+
+/**
+ * @file box.tpl.php
+ *
+ * Theme implementation to display a box.
+ *
+ * Available variables:
+ * - $title: Box title.
+ * - $content: Box content.
+ *
+ * @see template_preprocess()
+ */
+?>
+<div class="box">
+
+<?php if ($title): ?>
+  <h2><?php print $title ?></h2>
+<?php endif; ?>
+
+  <div class="content"><?php print $content ?></div>
+</div>