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CSS CSS Selectors Advanced Selectors :nth Pseudo-Class Challenge

I don't understand the statement: "To see which combination of images we selected,"

I'm not clear on what the statement is asking? Are they asking to give the different border color to the pictures that have the same name? or what?

style.css
/* Write the CSS in the media query below */

@media (min-width: 607px) {
  img {
    float: left; 
  }

  img:nth-child(3n+4) {
    clear: left;
  }


}
index.html
<!DOCTYPE html>
<html>
<head>
    <title>Selectors</title>
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link rel="stylesheet" href="page.css">
  <link rel="stylesheet" href="style.css">
</head>
<body>
    <img src="thumb-forest.jpg" alt="">
    <img src="thumb-resort.jpg" alt="">
    <img src="thumb-trees.jpg" alt="">
    <img src="thumb-falls.jpg" alt="">
    <img src="thumb-view.jpg" alt="">
    <img src="thumb-sunset.jpg" alt="">
    <img src="thumb-lake.jpg" alt="">
    <img src="thumb-beach.jpg" alt="">
    <img src="thumb-bay.jpg" alt="">
    <img src="thumb-peaks.jpg" alt="">
    <img src="thumb-falls.jpg" alt="">
    <img src="thumb-resort.jpg" alt="">
</body>
</html>

2 Answers

you just have to add a border-color property to your pseudo class :

  img:nth-child(3n+4) {
    clear: left;
    border-color: #fff;
  }

Thanks!