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---
id: 5d822fd413a79914d39e98e7
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title: Step 31
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challengeType: 0
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dashedName: step-31
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---
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# --description--
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Give the six new elements these `width` and `height` values: `10%` and `60%` to `.fb1` , `10%` and `40%` to `.fb2` , `10%` and `35%` to `.fb3` , `8%` and `45%` to `.fb4` , `10%` and `33%` to `.fb5` , and `9%` and `38%` to `.fb6` .
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# --hints--
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You should create a `.fb1` selector.
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```js
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assert.exists(new __helpers.CSSHelp(document).getStyle('.fb1'));
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```
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You should give the `.fb1` selector a `width` of `10%` .
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```js
assert.equal(new __helpers.CSSHelp(document).getStyle('.fb1')?.width, '10%');
```
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You should give the `.fb1` selector a `height` of `60%` .
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```js
assert.equal(new __helpers.CSSHelp(document).getStyle('.fb1')?.height, '60%');
```
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You should create a `.fb2` selector.
```js
assert.exists(new __helpers.CSSHelp(document).getStyle('.fb2'));
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```
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You should give the `.fb2` selector a `width` of `10%` .
```js
assert.equal(new __helpers.CSSHelp(document).getStyle('.fb2')?.width, '10%');
```
You should give the `.fb2` selector a `height` of `40%` .
```js
assert.equal(new __helpers.CSSHelp(document).getStyle('.fb2')?.height, '40%');
```
You should create a `.fb3` selector.
```js
assert.exists(new __helpers.CSSHelp(document).getStyle('.fb3'));
```
You should give the `.fb3` selector a `width` of `10%` .
```js
assert.equal(new __helpers.CSSHelp(document).getStyle('.fb3')?.width, '10%');
```
You should give the `.fb3` selector a `height` of `35%` .
```js
assert.equal(new __helpers.CSSHelp(document).getStyle('.fb3')?.height, '35%');
```
You should create a `.fb4` selector.
```js
assert.exists(new __helpers.CSSHelp(document).getStyle('.fb4'));
```
You should give the `.fb4` selector a `width` of `8%` .
```js
assert.equal(new __helpers.CSSHelp(document).getStyle('.fb4')?.width, '8%');
```
You should give the `.fb4` selector a `height` of `45%` .
```js
assert.equal(new __helpers.CSSHelp(document).getStyle('.fb4')?.height, '45%');
```
You should create a `.fb5` selector.
```js
assert.exists(new __helpers.CSSHelp(document).getStyle('.fb5'));
```
You should give the `.fb5` selector a `width` of `10%` .
```js
assert.equal(new __helpers.CSSHelp(document).getStyle('.fb5')?.width, '10%');
```
You should give the `.fb5` selector a `height` of `33%` .
```js
assert.equal(new __helpers.CSSHelp(document).getStyle('.fb5')?.height, '33%');
```
You should create a `.fb6` selector.
```js
assert.exists(new __helpers.CSSHelp(document).getStyle('.fb6'));
```
You should give the `.fb6` selector a `width` of `9%` .
```js
assert.equal(new __helpers.CSSHelp(document).getStyle('.fb6')?.width, '9%');
```
You should give the `.fb6` selector a `height` of `38%` .
```js
assert.equal(new __helpers.CSSHelp(document).getStyle('.fb6')?.height, '38%');
```
# --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" / >
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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 >
< 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 >
< / body >
< / html >
```
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```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 {
width: 100%;
height: 100%;
display: flex;
align-items: flex-end;
justify-content: space-evenly;
}
.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);
}
.foreground-buildings {
width: 100%;
height: 100%;
position: absolute;
top: 0;
}
--fcc-editable-region--
--fcc-editable-region--
```