Qr code using flexbox

Good afternoon I think you should remove the extra text (according to the layout)

<div class="attribution">
      Challenge by <a href="https://www.frontendmentor.io?ref=challenge" 
       target="_blank">Frontend Mentor</a>.
      Coded by <a href="#">Segun Richard</a>.
</div>

and also add padding to your text

.second-layer{
  padding: 10px;
}