2021-09-13 09:51:42 -07:00
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---
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id: 612e8279827a28352ce83a72
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2021-10-21 10:07:52 -07:00
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title: Step 7
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2021-09-13 09:51:42 -07:00
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challengeType: 0
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2021-10-21 10:07:52 -07:00
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dashedName: step-7
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2021-09-13 09:51:42 -07:00
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---
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# --description--
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Now copy the set of seven `.key` elements, and paste two more sets into the `.keys` div.
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# --hints--
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You should have 21 `.key` elements.
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```js
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const keys = document.querySelectorAll('.key');
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assert(keys?.length === 21);
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```
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You should have 15 `.black--key` elements.
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```js
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const blackKeys = document.querySelectorAll('.black--key');
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assert(blackKeys?.length === 15);
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```
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All `.key` elements should be within your `.keys` element.
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```js
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const keys = document.querySelector('.keys');
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assert(keys?.querySelectorAll('.key')?.length === 21);
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```
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All `.black--key` elements should be within your `.keys` element.
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```js
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const keys = document.querySelector('.keys');
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assert(keys?.querySelectorAll('.black--key')?.length === 15);
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```
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# --seed--
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## --seed-contents--
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```html
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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="UTF-8" />
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2022-03-14 15:54:43 +00:00
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<title>Piano</title>
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2021-09-13 09:51:42 -07:00
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<meta name="viewport" content="width=device-width, initial-scale=1.0" />
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</head>
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<body>
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--fcc-editable-region--
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<div id="piano">
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<div class="keys">
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<div class="key"></div>
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<div class="key black--key"></div>
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<div class="key black--key"></div>
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<div class="key"></div>
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<div class="key black--key"></div>
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<div class="key black--key"></div>
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<div class="key black--key"></div>
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</div>
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</div>
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--fcc-editable-region--
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</body>
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</html>
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```
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```css
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```
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