feat(curriculum): css picasso painting (#42436)

* feat: generating steps - Steps 1-32 done. - Steps 33-80 done. - Instructions 1-26 done. - Instructions 27-61 done. - More steps. - Instructions 62-88 done. - Clarify instructions for new concepts. - build fixes - Audit instructions on live site. * fix: add helpCategory * feat: write tests * feat: add intro * chore: use the right selectors Co-authored-by: gikf <60067306+gikf@users.noreply.github.com> * chore: cannot read property Shaun of undefined :) Co-authored-by: Shaun Hamilton <shauhami020@gmail.com> * feat: Shau-ptional chaining * chore: apply shaun's review suggestions Co-authored-by: Shaun Hamilton <shauhami020@gmail.com> * fix: uncross my wires * chore: apply shaun's review suggestions Co-authored-by: Shaun Hamilton <shauhami020@gmail.com> Co-authored-by: gikf <60067306+gikf@users.noreply.github.com> Co-authored-by: Shaun Hamilton <shauhami020@gmail.com>
2021-09-07 12:49:42 -07:00
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--- a/curriculum/challenges/english/01-responsive-web-design/css-picasso-painting/part-010.md
+++ b/curriculum/challenges/english/01-responsive-web-design/css-picasso-painting/part-010.md
@@ -0,0 +1,59 @@
+---
+id: 60b69a66b6ddb80858c51580
+title: Part 10
+challengeType: 0
+dashedName: part-10
+---
+
+# --description--
+
+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.
+
+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.
+
+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`.
+
+# --hints--
+
+Your `#back-wall` selector should have the `z-index` property set to `-1`.
+
+```js
+assert(new __helpers.CSSHelp(document).getStyle('#back-wall')?.zIndex === '-1');
+```
+
+# --seed--
+
+## --seed-contents--
+
+```html
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="utf-8">
+    <title>freeCodeCamp Picasso Painting</title>
+    <link rel="stylesheet" type="text/css" href="./styles.css" />
+    <link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.8.2/css/all.css">
+  </head>
+  <body>
+    <div id="back-wall"></div>
+  </body>
+</html>
+```
+
+```css
+body {
+  background-color: rgb(184, 132, 46);
+}
+
+#back-wall {
+  background-color: #8B4513;
+  width: 100%;
+  height: 60%;
+  position: absolute;
+  top: 0;
+  left: 0;
+  --fcc-editable-region--
+
+  --fcc-editable-region--
+}
+```