The code below doesn't seem to work

Tell us what’s happening:

  **Your code so far**

:root {
  --red-color: red;
.red-box {
  background: red;
  background: var(--red-color);
  background: var(--red-color);
  height: 200px;
<div class="red-box"></div>
  **Your browser information:**

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:86.0) Gecko/20100101 Firefox/86.0.

Challenge: Improve Compatibility with Browser Fallbacks

Link to the challenge:

Hi @gonefission !

Not sure why you wrote this twice.

But if you delete one of them then it will pass.

thank you. i should have seen that. not too sure how it got there (or rather when i put it there) your assistance is much appreciated