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---
id: 6153a3952facd25a83fe8083
title: Step 20
challengeType: 0
dashedName: step-20
---
# --description--
Create a media query for screens smaller than `800px` in width. In that media query, create a `#gallery img` rule and set the `width` property to `50%` . This will convert your gallery to a two-column layout.
# --hints--
You should add a new `@media` query.
```js
assert(new __helpers.CSSHelp(document).getCSSRules('media')?.length === 1);
```
Your new `@media` query should have a `max-width` of `800px` .
```js
assert(new __helpers.CSSHelp(document).getCSSRules('media')?.[0]?.media?.mediaText === '(max-width: 800px)');
```
Your `@media` query should have a `#gallery img` rule.
```js
const rules = new __helpers.CSSHelp(document).getRuleListsWithinMedia('(max-width: 800px)');
assert(rules?.find(rule => rule.selectorText === '#gallery img'));
```
Your `#gallery img` rule should have a `width` property set to `50%` .
```js
const rules = new __helpers.CSSHelp(document).getRuleListsWithinMedia('(max-width: 800px)');
const imgRule = rules?.find(rule => rule.selectorText === '#gallery img');
assert(imgRule?.style.width === '50%');
```
# --seed--
## --seed-contents--
```html
<!DOCTYPE html>
< html >
< head >
< meta charset = "utf-8" >
< meta name = "viewport" content = "width=device-width, initial-scale=1.0" >
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< title > Photo Gallery< / title >
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< link rel = "stylesheet" href = "./styles.css" >
< / head >
< body >
< div class = "header" >
< h1 > CSS FLEXBOX PHOTO GALLERY< / h1 >
< / div >
< div id = "gallery" >
< img src = "https://cdn.freecodecamp.org/curriculum/css-photo-gallery/1.jpg" / >
< img src = "https://cdn.freecodecamp.org/curriculum/css-photo-gallery/2.jpg" / >
< img src = "https://cdn.freecodecamp.org/curriculum/css-photo-gallery/3.jpg" / >
< img src = "https://cdn.freecodecamp.org/curriculum/css-photo-gallery/4.jpg" / >
< img src = "https://cdn.freecodecamp.org/curriculum/css-photo-gallery/5.jpg" / >
< img src = "https://cdn.freecodecamp.org/curriculum/css-photo-gallery/6.jpg" / >
< img src = "https://cdn.freecodecamp.org/curriculum/css-photo-gallery/7.jpg" / >
< img src = "https://cdn.freecodecamp.org/curriculum/css-photo-gallery/8.jpg" / >
< img src = "https://cdn.freecodecamp.org/curriculum/css-photo-gallery/9.jpg" / >
< img src = "https://cdn.freecodecamp.org/curriculum/css-photo-gallery/10.jpg" / >
< / div >
< / body >
< / html >
```
```css
* {
box-sizing: border-box;
}
body {
margin: 0;
font-family: Arial;
background: #EBE7E7 ;
}
.header {
text-align: center;
padding: 32px;
background: #E0DDDD ;
}
#gallery {
display: flex;
flex-direction: row;
flex-wrap: wrap;
justify-content: center;
align-items: center;
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padding: 0 4px;
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}
#gallery img {
width: 25%;
height: 300px;
object-fit: cover;
margin-top: 8px;
padding: 0 4px;
border-radius: 10px;
}
--fcc-editable-region--
--fcc-editable-region--
```
