2019-11-04 21:01:05 -06:00
---
id: 5d822fd413a79914d39e98d5
title: Part 13
challengeType: 0
2020-06-24 16:22:14 +09:00
isHidden: true
2019-11-04 21:01:05 -06:00
---
## Description
< section id = 'description' >
Give your `bb1` element these style properties: `display: flex;` , `flex-direction: column;` , and `align-items: center;` . This will center the parts of the building using "flex" or "flexbox". You will learn about it in more detail on another project.
< / section >
## Instructions
< section id = 'instructions' >
< / section >
## Tests
< section id = 'tests' >
```yml
tests:
- text: test-text
testString: const bb1 = $(".bb1"); assert(bb1.css("display") === "flex" & & bb1.css("flex-direction") === "column" & & bb1.css("align-items") === "center");
```
< / section >
## Challenge Seed
< section id = 'challengeSeed' >
< div id = 'html-seed' >
```html
<!DOCTYPE html>
< html >
< head >
< title > freeCodeCamp Skyline Project< / title >
< style >
* {
border: 1px solid black;
box-sizing: border-box;
}
body {
height: 100vh;
margin: 0;
overflow: hidden;
}
.background-buildings {
width: 100%;
height: 100%;
}
.bb1 {
width: 10%;
height: 70%;
}
.bb1a {
width: 70%;
height: 10%;
}
.bb1b {
width: 80%;
height: 10%;
}
.bb1c {
width: 90%;
height: 10%;
}
.bb1d {
width: 100%;
height: 70%;
}
< / style >
< / head >
< body >
< div class = "background-buildings" >
< div class = "bb1" >
< div class = "bb1a" > < / div >
< div class = "bb1b" > < / div >
< div class = "bb1c" > < / div >
< div class = "bb1d" > < / div >
< / div >
< / div >
< / body >
< / html >
```
< / div >
< / section >
## Solution
< section id = 'solution' >
```html
<!DOCTYPE html>
< html >
< head >
< title > freeCodeCamp Skyline Project< / title >
< style >
* {
border: 1px solid black;
box-sizing: border-box;
}
body {
height: 100vh;
margin: 0;
overflow: hidden;
}
.background-buildings {
width: 100%;
height: 100%;
}
.bb1 {
width: 10%;
height: 70%;
display: flex;
flex-direction: column;
align-items: center;
}
.bb1a {
width: 70%;
height: 10%;
}
.bb1b {
width: 80%;
height: 10%;
}
.bb1c {
width: 90%;
height: 10%;
}
.bb1d {
width: 100%;
height: 70%;
}
< / style >
< / head >
< body >
< div class = "background-buildings" >
< div class = "bb1" >
< div class = "bb1a" > < / div >
< div class = "bb1b" > < / div >
< div class = "bb1c" > < / div >
< div class = "bb1d" > < / div >
< / div >
< / div >
< / body >
< / html >
```
< / section >
