---
id: 5d822fd413a79914d39e98db
title: Part 19
challengeType: 0
dashedName: part-19
---

# --description--

Give the new buildings `width` and `height` properties of: `10%` and `50%` for `bb2`, `10%` and `55%` for `bb3`, and `11%` and `58%` for `bb4`. You will be using almost all percent based units and some Flexbox for this project, so everything will be completely responsive.

# --hints--

test-text

```js
const bb2 = code.match(/\.bb2\s*{[\s\S]+?[^}]}/g)[0];
const bb3 = code.match(/\.bb3\s*{[\s\S]+?[^}]}/g)[0];
const bb4 = code.match(/\.bb4\s*{[\s\S]+?[^}]}/g)[0];
assert(
  /width\s*:\s*10%\s*(;|})/g.test(bb2) &&
    /height\s*:\s*50%\s*(;|})/g.test(bb2) &&
    /width\s*:\s*10%\s*(;|})/g.test(bb3) &&
    /height\s*:\s*55%\s*(;|})/g.test(bb3) &&
    /width\s*:\s*11%\s*(;|})/g.test(bb4) &&
    /height\s*:\s*58%\s*(;|})/g.test(bb4)
);
```

# --seed--

## --seed-contents--

```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;
        --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);
      }
    </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 class="bb2"></div>
      <div class="bb3"></div>
      <div class="bb4"></div>
    </div>
  </body>
</html>
```

# --solutions--

```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;
        --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);
      }

      .bb2 {
        width: 10%;
        height: 50%;
      }

      .bb3 {
        width: 10%;
        height: 55%;
      }

      .bb4 {
        width: 11%;
        height: 58%;
      }
    </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 class="bb2"></div>
      <div class="bb3"></div>
      <div class="bb4"></div>
    </div>
  </body>
</html>
```
