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---
id: 5d822fd413a79914d39e98ec
title: Step 36
challengeType: 0
dashedName: step-36
---
# --description--
Comprimi di nuovo gli edifici aggiungendo due elementi `div` vuoti sia in cima che alla fine dell'elemento `.foreground-buildings` e uno tra `.fb2` e `.fb3` .
# --hints--
Dovresti aggiungere due elementi `div` come primi figli di `.foreground-buildings` .
```js
const bBuildings = document.querySelector('.background-buildings')?.children;
assert(![...bBuildings?.[0]?.classList]?.includes('fb1'));
assert(![...bBuildings?.[1]?.classList]?.includes('fb1'));
```
Dovresti aggiungere un nuovo elemento `div` tra l'elemento `.fb2` e `.fb3` .
```js
assert(document.querySelector('.fb2')?.nextElementSibling === document.querySelector('.fb3')?.previousElementSibling);
```
Dovresti aggiungere due elementi `div` come ultimi figli di `.foreground-buildings` .
```js
const fb6 = document.querySelector('.fb6');
assert.exists(fb6?.nextElementSibling);
assert.exists(fb6?.nextElementSibling?.nextElementSibling);
```
Dovresti aggiungere 5 nuovi elementi `div` .
```js
assert.equal(document.querySelectorAll('div')?.length, 26);
```
# --seed--
## --seed-contents--
```html
<!DOCTYPE html>
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< html lang = "en" >
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< head >
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< meta charset = "UTF-8" >
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< title > City Skyline< / title >
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< link href = "styles.css" rel = "stylesheet" / >
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< / head >
< body >
< div class = "background-buildings" >
< div > < / div >
< div > < / div >
< div class = "bb1" >
< div class = "bb1a" > < / div >
< div class = "bb1b" > < / div >
< div class = "bb1c" > < / div >
< div class = "bb1d" > < / div >
< / div >
< div class = "bb2" > < / div >
< div class = "bb3" > < / div >
< div > < / div >
< div class = "bb4" > < / div >
< div > < / div >
< div > < / div >
< / div >
--fcc-editable-region--
< div class = "foreground-buildings" >
< div class = "fb1" > < / div >
< div class = "fb2" > < / div >
< div class = "fb3" > < / div >
< div class = "fb4" > < / div >
< div class = "fb5" > < / div >
< div class = "fb6" > < / div >
< / div >
--fcc-editable-region--
< / body >
< / html >
```
```css
:root {
--building-color1: #aa80ff ;
--building-color2: #66cc99 ;
--building-color3: #cc6699 ;
--building-color4: #538cc6 ;
}
* {
border: 1px solid black;
box-sizing: border-box;
}
body {
height: 100vh;
margin: 0;
overflow: hidden;
}
.background-buildings, .foreground-buildings {
width: 100%;
height: 100%;
display: flex;
align-items: flex-end;
justify-content: space-evenly;
position: absolute;
top: 0;
}
.bb1 {
width: 10%;
height: 70%;
display: flex;
flex-direction: column;
align-items: center;
}
.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);
}
.bb2 {
width: 10%;
height: 50%;
background-color: var(--building-color2);
}
.bb3 {
width: 10%;
height: 55%;
background-color: var(--building-color3);
}
.bb4 {
width: 11%;
height: 58%;
background-color: var(--building-color4);
}
.fb1 {
width: 10%;
height: 60%;
background-color: var(--building-color4);
}
.fb2 {
width: 10%;
height: 40%;
background-color: var(--building-color3);
}
.fb3 {
width: 10%;
height: 35%;
background-color: var(--building-color1);
}
.fb4 {
width: 8%;
height: 45%;
background-color: var(--building-color1);
}
.fb5 {
width: 10%;
height: 33%;
background-color: var(--building-color2);
}
.fb6 {
width: 9%;
height: 38%;
background-color: var(--building-color3);
}
```
