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---
id: 5d822fd413a79914d39e98da
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title: Step 18
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challengeType: 0
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dashedName: step-18
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---
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# --description--
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Your first building looks pretty good now. Let's make some more! Nest three new `div` elements in the `background-buildings` container and give them the classes of `bb2` , `bb3` , and `bb4` in that order. These will be three more buildings for the background.
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# --hints--
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You should create a `div` with a class of `bb2` .
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```js
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assert.exists(document.querySelector('div.bb2'));
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```
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You should create a `div` with a class of `bb3` .
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```js
assert.exists(document.querySelector('div.bb3'));
```
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You should create a `div` with a class of `bb4` .
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```js
assert.exists(document.querySelector('div.bb4'));
```
You should create 3 new `div` elements.
```js
assert.equal(document.querySelectorAll('div')?.length, 9);
```
You should place these `div` elements within the `.background-buildings` element.
```js
assert.equal(document.querySelector('div.background-buildings')?.children?.length, 4);
```
You should place the elements in the correct order.
```js
function __t(a, b) {
return [...document.querySelector(a)?.nextElementSibling?.classList]?.includes(b);
}
assert(__t('div.bb1','bb2') & & __t('div.bb2','bb3') & & __t('div.bb3','bb4'));
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```
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# --seed--
## --seed-contents--
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```html
<!DOCTYPE html>
< html >
< head >
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< title > City Skyline< / title >
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< link href = "styles.css" rel = "stylesheet" type = "text/css" / >
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< / 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 >
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--fcc-editable-region--
--fcc-editable-region--
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< / div >
< / body >
< / html >
```
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```css
* {
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;
--building-color1: #aa80ff ;
}
.bb1a {
width: 70%;
height: 10%;
background-color: var(--building-color1);
}
.bb1b {
width: 80%;
height: 10%;
background-color: var(--building-color1);
}
.bb1c {
width: 90%;
height: 10%;
background-color: var(--building-color1);
}
.bb1d {
width: 100%;
height: 70%;
background-color: var(--building-color1);
}
```
