Update Code templates.html

Code templates.html

@@ -18,7 +18,7 @@ <h1 id="text" style="color:white;">Code templates</h1>
     <a href="Javascript.html">
     <button type="button" name="js">Javascript</button>
     </a>
-    <button onclick="start()">???</button>
+    <button onclick="start()" style="background-color:black;">???</button>
     </div>
     <script src="needed/js.js"></script>
 </body>