---
id: 6196cee94c6da1253809dff9
title: Step 20
challengeType: 0
dashedName: step-20
---
# --description--
Target the `.back-mountain` element, and set its `width` and `height` to `300px`. Then, set the `background` to a linear gradient starting at `rgb(203, 241, 228)` and ending at `rgb(47, 170, 255)`.
# --hints--
You should use the `.back-mountain` selector.
```js
assert.match(code, /\.back-mountain\s*\{/);
```
You should give `.back-mountain` a `width` of `300px`.
```js
assert.equal(new __helpers.CSSHelp(document).getStyle('.back-mountain')?.width, '300px');
```
You should give `.back-mountain` a `height` of `300px`.
```js
assert.equal(new __helpers.CSSHelp(document).getStyle('.back-mountain')?.height, '300px');
```
You should give `.back-mountain` a `background` of `linear-gradient(rgb(203, 241, 228), rgb(47, 170, 255))`.
```js
assert.include(['linear-gradient(rgb(203,241,228),rgb(47,170,255))', 'rgba(0,0,0,0)linear-gradient(rgb(203,241,228),rgb(47,170,255))repeatscroll0%0%'], new __helpers.CSSHelp(document).getStyle('.back-mountain')?.getPropVal('background', true));
```
# --seed--
## --seed-contents--
```html
Penguin
```
```css
body {
background: linear-gradient(45deg, rgb(118, 201, 255), rgb(247, 255, 222));
margin: 0;
padding: 0;
width: 100%;
height: 100vh;
overflow: clip;
}
.left-mountain {
width: 300px;
height: 300px;
background: linear-gradient(rgb(203, 241, 228), rgb(80, 183, 255));
position: absolute;
transform: skew(0deg, 44deg);
z-index: 2;
margin-top: 100px;
}
--fcc-editable-region--
--fcc-editable-region--
.penguin {
width: 300px;
height: 300px;
margin: auto;
margin-top: 75px;
}
.ground {
width: 100vw;
height: 400px;
background: linear-gradient(90deg, rgb(88, 175, 236), rgb(182, 255, 255));
z-index: 3;
position: absolute;
margin-top: -58px;
}
```