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---
id: 612e8eebe3a6dc3fcc33a66f
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title: Step 11
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challengeType: 0
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dashedName: step-11
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---
# --description--
Now target your `#piano` element with an `id` selector. Set `background-color` property to `#00471b` , the `width` property to `992px` and the `height` property to `290px` .
# --hints--
You should have a `#piano` selector.
```js
assert(new __helpers.CSSHelp(document).getStyle('#piano '));
```
Your `#piano` selector should have the `background-color` property set to `#00471b` .
```js
assert(new __helpers.CSSHelp(document).getStyle('#piano ')?.backgroundColor === 'rgb(0, 71, 27)');
```
Your `#piano` selector should have a `width` property set to `992px` .
```js
assert(new __helpers.CSSHelp(document).getStyle('#piano ')?.width === '992px');
```
Your `#piano` selector should have the `height` set to `290px` .
```js
assert(new __helpers.CSSHelp(document).getStyle('#piano ')?.height === '290px');
```
# --seed--
## --seed-contents--
```html
<!DOCTYPE html>
< html >
< head >
< meta charset = "UTF-8" / >
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< title > Piano< / title >
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< meta name = "viewport" content = "width=device-width, initial-scale=1.0" / >
< link rel = "stylesheet" href = "./styles.css" >
< / head >
< body >
< div id = "piano" >
< div class = "keys" >
< div class = "key" > < / div >
< div class = "key black--key" > < / div >
< div class = "key black--key" > < / div >
< div class = "key" > < / div >
< div class = "key black--key" > < / div >
< div class = "key black--key" > < / div >
< div class = "key black--key" > < / div >
< div class = "key" > < / div >
< div class = "key black--key" > < / div >
< div class = "key black--key" > < / div >
< div class = "key" > < / div >
< div class = "key black--key" > < / div >
< div class = "key black--key" > < / div >
< div class = "key black--key" > < / div >
< div class = "key" > < / div >
< div class = "key black--key" > < / div >
< div class = "key black--key" > < / div >
< div class = "key" > < / div >
< div class = "key black--key" > < / div >
< div class = "key black--key" > < / div >
< div class = "key black--key" > < / div >
< / div >
< / div >
< / body >
< / html >
```
```css
html {
box-sizing: border-box;
}
*, *::before, * ::after {
box-sizing: inherit;
}
--fcc-editable-region--
--fcc-editable-region--
```
