the prompt is asking that I add a class of black–key on the second .key element, and I believe that’s what I’ve done. What could I be doing wrong?
<div class="keys">
<div class="key"></div>
<div class="key" class="black--key"></div>
<div class="key" class="black--key"></div>
<div class="key"></div>
<div class="key" class="black--key"></div>
<div class="key" class="black--key"></div>
<div class="key" class="black--key"></div>
</div>
</div>
<!-- User Editable Region -->
</body>
</html>