---
id: 5d822fd413a79914d39e992d
title: Part 100
challengeType: 0
dashedName: part-100
---

# --description--

Give the `fb4-window` elements a `width` of `30%`, `height` of `10%`, and `border-radius` of `50%`. These will make some circular windows for this building.

# --hints--

test-text

```js
const fb4w = code.match(/\.fb4-window\s*{[\s\S]+?[^}]}/g)[0];
assert(
  /width\s*:\s*30%\s*(;|})/g.test(fb4w) &&
    /height\s*:\s*10%\s*(;|})/g.test(fb4w) &&
    /border-radius\s*:\s*50%\s*(;|})/g.test(fb4w)
);
```

# --seed--

## --seed-contents--

```html
<!DOCTYPE html>
<html>    
  <head>
    <title>freeCodeCamp Skyline Project</title>
    <style>
      :root {
        --building-color1: #aa80ff;
        --building-color2: #66cc99;
        --building-color3: #cc6699;
        --building-color4: #538cc6;
        --window-color1: #bb99ff;
        --window-color2: #8cd9b3;
        --window-color3: #d98cb3;
        --window-color4: #8cb3d9;
      }

      * {
        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;
      }
      
      .building-wrap {
        display: flex;
        flex-direction: column;
        align-items: center;
      }

      .window-wrap {
        display: flex;
        align-items: center;
        justify-content: space-evenly;
      }

      /* BACKGROUND BUILDINGS - "bb" stands for "background building" */
      .bb1 {
        width: 10%;
        height: 70%;
      }

      .bb1a {
        width: 70%;
      }
  
      .bb1b {
        width: 80%;
      }
  
      .bb1c {
        width: 90%;
      }

      .bb1d {
        width: 100%;
        height: 70%;
        background: linear-gradient(
            var(--building-color1) 50%,
            var(--window-color1)
          );
      }

      .bb1-window {
        height: 10%;
        background: linear-gradient(
            var(--building-color1),
            var(--window-color1)
          );
      }

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

      .bb2a {
        border-bottom: 5vh solid var(--building-color2);
        border-left: 5vw solid transparent;
        border-right: 5vw solid transparent;
      }

      .bb2b {
        width: 100%;
        height: 100%;
        background: repeating-linear-gradient(
            var(--building-color2),
            var(--building-color2) 6%,
            var(--window-color2) 6%,
            var(--window-color2) 9%
          );
      }
      
      .bb3 {
        width: 10%;
        height: 55%;
        background: repeating-linear-gradient(
            90deg,
            var(--building-color3),
            var(--building-color3),
            var(--window-color3) 15%
          );
      }

      .bb4 {
        width: 11%;
        height: 58%;
      }

      .bb4a {
        width: 3%;
        height: 10%;
        background-color: var(--building-color4);
      }

      .bb4b {
        width: 80%;
        height: 5%;
        background-color: var(--building-color4);
      }
  
      .bb4c {
        width: 100%;
        height: 85%;
        background-color: var(--building-color4);
      }

      .bb4-window {
        width: 18%;
        height: 90%;
        background-color: var(--window-color4);
      }

      /* FOREGROUND BUILDINGS - "fb" stands for "foreground building" */
      .fb1 {
        width: 10%;
        height: 60%;
      }

      .fb1a {
        border-bottom: 7vh solid var(--building-color4);
        border-left: 2vw solid transparent;
        border-right: 2vw solid transparent;
      }

      .fb1b {
        width: 60%;
        height: 10%;
        background-color: var(--building-color4);
      }
  
      .fb1c {
        width: 100%;
        height: 80%;
        background: repeating-linear-gradient(
            90deg,
            var(--building-color4),
            var(--building-color4) 10%,
            transparent 10%,
            transparent 15%
          ),
          repeating-linear-gradient(
            var(--building-color4),
            var(--building-color4) 10%,
            var(--window-color4) 10%,
            var(--window-color4) 90%
          );
      }

      .fb2 {
        width: 10%;
        height: 40%;
      }

      .fb2a {
        width: 100%;
        border-bottom: 10vh solid var(--building-color3);
        border-left: 1vw solid transparent;
        border-right: 1vw solid transparent;
      }

      .fb2b {
        width: 100%;
        height: 75%;
        background-color: var(--building-color3);
      }

      .fb2-window {
        width: 22%;
        height: 100%;
        background-color: var(--window-color3);
      }

      .fb3 {
        width: 10%;
        height: 35%;
      }
  
      .fb3a {
        width: 80%;
        height: 15%;
        background-color: var(--building-color1);
      }
  
      .fb3b {
        width: 100%;
        height: 35%;
        background-color: var(--building-color1);
      }

      .fb3-window {
        width: 25%;
        height: 80%;
        background-color: var(--window-color1);
      }

      .fb4 {
        width: 8%;
        height: 45%;
        position: relative;
        left: 10%;
      }

      .fb4b {
        width: 100%;
        height: 89%;
        background-color: var(--building-color1);
      }
      
      .fb5 {
        width: 10%;
        height: 33%;
        background-color: var(--building-color2);
        position: relative;
        right: 10%;
      }

      .fb6 {
        width: 9%;
        height: 38%;
        background-color: var(--building-color3);
      }
    </style>
  </head>

  <body>
    <div class="background-buildings">
      <div></div>
      <div></div>
      <div class="bb1 building-wrap">
        <div class="bb1a bb1-window"></div>
        <div class="bb1b bb1-window"></div>
        <div class="bb1c bb1-window"></div>
        <div class="bb1d"></div>
      </div>
      <div class="bb2">
        <div class="bb2a"></div>
        <div class="bb2b"></div>
      </div>
      <div class="bb3"></div>
      <div></div>
      <div class="bb4 building-wrap">
        <div class="bb4a"></div>
        <div class="bb4b"></div>
        <div class="bb4c window-wrap">
          <div class="bb4-window"></div>
          <div class="bb4-window"></div>
          <div class="bb4-window"></div>
          <div class="bb4-window"></div>
        </div>
      </div>
      <div></div>
      <div></div>
    </div>

    <div class="foreground-buildings">
      <div></div>
      <div></div>
      <div class="fb1 building-wrap">
        <div class="fb1a"></div>
        <div class="fb1b"></div>
        <div class="fb1c"></div>
      </div>
      <div class="fb2">
        <div class="fb2a"></div>
        <div class="fb2b window-wrap">
          <div class="fb2-window"></div>
          <div class="fb2-window"></div>
          <div class="fb2-window"></div>
        </div>
      </div>
      <div></div>
      <div class="fb3 building-wrap">
        <div class="fb3a window-wrap">
          <div class="fb3-window"></div>
          <div class="fb3-window"></div>
          <div class="fb3-window"></div>
        </div>
        <div class="fb3b"></div>
        <div class="fb3a"></div>
        <div class="fb3b"></div>
      </div>
      <div class="fb4">
        <div class="fb4a"></div>
        <div class="fb4b">
          <div class="fb4-window"></div>
          <div class="fb4-window"></div>
          <div class="fb4-window"></div>
          <div class="fb4-window"></div>
          <div class="fb4-window"></div>
          <div class="fb4-window"></div>
        </div>
      </div>
      <div class="fb5"></div>
      <div class="fb6"></div>
      <div></div>
      <div></div>
    </div>
  </body>
</html>
```

# --solutions--

```html
<!DOCTYPE html>
<html>    
  <head>
    <title>freeCodeCamp Skyline Project</title>
    <style>
      :root {
        --building-color1: #aa80ff;
        --building-color2: #66cc99;
        --building-color3: #cc6699;
        --building-color4: #538cc6;
        --window-color1: #bb99ff;
        --window-color2: #8cd9b3;
        --window-color3: #d98cb3;
        --window-color4: #8cb3d9;
      }

      * {
        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;
      }
      
      .building-wrap {
        display: flex;
        flex-direction: column;
        align-items: center;
      }

      .window-wrap {
        display: flex;
        align-items: center;
        justify-content: space-evenly;
      }

      /* BACKGROUND BUILDINGS - "bb" stands for "background building" */
      .bb1 {
        width: 10%;
        height: 70%;
      }

      .bb1a {
        width: 70%;
      }
  
      .bb1b {
        width: 80%;
      }
  
      .bb1c {
        width: 90%;
      }

      .bb1d {
        width: 100%;
        height: 70%;
        background: linear-gradient(
            var(--building-color1) 50%,
            var(--window-color1)
          );
      }

      .bb1-window {
        height: 10%;
        background: linear-gradient(
            var(--building-color1),
            var(--window-color1)
          );
      }

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

      .bb2a {
        border-bottom: 5vh solid var(--building-color2);
        border-left: 5vw solid transparent;
        border-right: 5vw solid transparent;
      }

      .bb2b {
        width: 100%;
        height: 100%;
        background: repeating-linear-gradient(
            var(--building-color2),
            var(--building-color2) 6%,
            var(--window-color2) 6%,
            var(--window-color2) 9%
          );
      }
      
      .bb3 {
        width: 10%;
        height: 55%;
        background: repeating-linear-gradient(
            90deg,
            var(--building-color3),
            var(--building-color3),
            var(--window-color3) 15%
          );
      }

      .bb4 {
        width: 11%;
        height: 58%;
      }

      .bb4a {
        width: 3%;
        height: 10%;
        background-color: var(--building-color4);
      }

      .bb4b {
        width: 80%;
        height: 5%;
        background-color: var(--building-color4);
      }
  
      .bb4c {
        width: 100%;
        height: 85%;
        background-color: var(--building-color4);
      }

      .bb4-window {
        width: 18%;
        height: 90%;
        background-color: var(--window-color4);
      }

      /* FOREGROUND BUILDINGS - "fb" stands for "foreground building" */
      .fb1 {
        width: 10%;
        height: 60%;
      }

      .fb1a {
        border-bottom: 7vh solid var(--building-color4);
        border-left: 2vw solid transparent;
        border-right: 2vw solid transparent;
      }

      .fb1b {
        width: 60%;
        height: 10%;
        background-color: var(--building-color4);
      }
  
      .fb1c {
        width: 100%;
        height: 80%;
        background: repeating-linear-gradient(
            90deg,
            var(--building-color4),
            var(--building-color4) 10%,
            transparent 10%,
            transparent 15%
          ),
          repeating-linear-gradient(
            var(--building-color4),
            var(--building-color4) 10%,
            var(--window-color4) 10%,
            var(--window-color4) 90%
          );
      }

      .fb2 {
        width: 10%;
        height: 40%;
      }

      .fb2a {
        width: 100%;
        border-bottom: 10vh solid var(--building-color3);
        border-left: 1vw solid transparent;
        border-right: 1vw solid transparent;
      }

      .fb2b {
        width: 100%;
        height: 75%;
        background-color: var(--building-color3);
      }

      .fb2-window {
        width: 22%;
        height: 100%;
        background-color: var(--window-color3);
      }

      .fb3 {
        width: 10%;
        height: 35%;
      }
  
      .fb3a {
        width: 80%;
        height: 15%;
        background-color: var(--building-color1);
      }
  
      .fb3b {
        width: 100%;
        height: 35%;
        background-color: var(--building-color1);
      }

      .fb3-window {
        width: 25%;
        height: 80%;
        background-color: var(--window-color1);
      }

      .fb4 {
        width: 8%;
        height: 45%;
        position: relative;
        left: 10%;
      }

      .fb4b {
        width: 100%;
        height: 89%;
        background-color: var(--building-color1);
      }
      
      .fb4-window {
        width: 30%;
        height: 10%;
        border-radius: 50%;
      }

      .fb5 {
        width: 10%;
        height: 33%;
        background-color: var(--building-color2);
        position: relative;
        right: 10%;
      }

      .fb6 {
        width: 9%;
        height: 38%;
        background-color: var(--building-color3);
      }
    </style>
  </head>

  <body>
    <div class="background-buildings">
      <div></div>
      <div></div>
      <div class="bb1 building-wrap">
        <div class="bb1a bb1-window"></div>
        <div class="bb1b bb1-window"></div>
        <div class="bb1c bb1-window"></div>
        <div class="bb1d"></div>
      </div>
      <div class="bb2">
        <div class="bb2a"></div>
        <div class="bb2b"></div>
      </div>
      <div class="bb3"></div>
      <div></div>
      <div class="bb4 building-wrap">
        <div class="bb4a"></div>
        <div class="bb4b"></div>
        <div class="bb4c window-wrap">
          <div class="bb4-window"></div>
          <div class="bb4-window"></div>
          <div class="bb4-window"></div>
          <div class="bb4-window"></div>
        </div>
      </div>
      <div></div>
      <div></div>
    </div>

    <div class="foreground-buildings">
      <div></div>
      <div></div>
      <div class="fb1 building-wrap">
        <div class="fb1a"></div>
        <div class="fb1b"></div>
        <div class="fb1c"></div>
      </div>
      <div class="fb2">
        <div class="fb2a"></div>
        <div class="fb2b window-wrap">
          <div class="fb2-window"></div>
          <div class="fb2-window"></div>
          <div class="fb2-window"></div>
        </div>
      </div>
      <div></div>
      <div class="fb3 building-wrap">
        <div class="fb3a window-wrap">
          <div class="fb3-window"></div>
          <div class="fb3-window"></div>
          <div class="fb3-window"></div>
        </div>
        <div class="fb3b"></div>
        <div class="fb3a"></div>
        <div class="fb3b"></div>
      </div>
      <div class="fb4">
        <div class="fb4a"></div>
        <div class="fb4b">
          <div class="fb4-window"></div>
          <div class="fb4-window"></div>
          <div class="fb4-window"></div>
          <div class="fb4-window"></div>
          <div class="fb4-window"></div>
          <div class="fb4-window"></div>
        </div>
      </div>
      <div class="fb5"></div>
      <div class="fb6"></div>
      <div></div>
      <div></div>
    </div>
  </body>
</html>
```
