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---
id: 5d822fd413a79914d39e98d4
title: Part 12
challengeType: 0
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dashedName: part-12
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---
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# --description--
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Give the parts of your building `width` and `height` properties with these values: `70%` and `10%` to `bb1a` , `80%` and `10%` to `bb1b` , `90%` and `10%` to `bb1c` , and `100%` and `70%` to `bb1d` . Remember that these percentages are relative to the parent and note that the heights will add up to 100% to fill the container vertically.
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# --hints--
test-text
```js
const bb1a = code.match(/\.bb1a\s*{[\s\S]+?[^}]}/g)[0];
const bb1b = code.match(/\.bb1b\s*{[\s\S]+?[^}]}/g)[0];
const bb1c = code.match(/\.bb1c\s*{[\s\S]+?[^}]}/g)[0];
const bb1d = code.match(/\.bb1d\s*{[\s\S]+?[^}]}/g)[0];
assert(
/width\s*:\s*70%\s*(;|})/g.test(bb1a) &&
/height\s*:\s*10%\s*(;|})/g.test(bb1a) &&
/width\s*:\s*80%\s*(;|})/g.test(bb1b) &&
/height\s*:\s*10%\s*(;|})/g.test(bb1b) &&
/width\s*:\s*90%\s*(;|})/g.test(bb1c) &&
/height\s*:\s*10%\s*(;|})/g.test(bb1c) &&
/width\s*:\s*100%\s*(;|})/g.test(bb1d) &&
/height\s*:\s*70%\s*(;|})/g.test(bb1d)
);
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```
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# --seed--
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## --seed-contents--
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```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%;
}
< / 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 >
```
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# --solutions--
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```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 >
```
