60 lines
1.4 KiB
Markdown
60 lines
1.4 KiB
Markdown
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---
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id: 60b69a66b6ddb80858c51580
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title: Part 10
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challengeType: 0
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dashedName: part-10
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---
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# --description--
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The `z-index` property is used to create "layers" for your HTML elements. If you are familiar with image editing tools, you may have worked with layers before. This is a similar concept.
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Elements with a higher `z-index` value will appear to be layered on top of elements with a lower `z-index` value. This can be combined with the positioning in the previous lesson to create unique effects.
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Since the `back-wall` element will need to appear "behind" the other elements you will be creating, give the `back-wall` element a `z-index` of `-1`.
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# --hints--
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Your `#back-wall` selector should have the `z-index` property set to `-1`.
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```js
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assert(new __helpers.CSSHelp(document).getStyle('#back-wall')?.zIndex === '-1');
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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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<title>freeCodeCamp Picasso Painting</title>
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<link rel="stylesheet" type="text/css" href="./styles.css" />
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<link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.8.2/css/all.css">
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</head>
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<body>
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<div id="back-wall"></div>
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</body>
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</html>
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```
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```css
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body {
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background-color: rgb(184, 132, 46);
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}
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#back-wall {
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background-color: #8B4513;
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width: 100%;
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height: 60%;
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position: absolute;
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top: 0;
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left: 0;
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--fcc-editable-region--
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--fcc-editable-region--
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}
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```
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