---
id: 5d822fd413a79914d39e993e
title: Step 118
challengeType: 0
dashedName: step-118
---

# --description--

Lastly, in the `:root` selector of the media query, redefine all four of the `--window-color` variables to use `#777`. When you're done, resize the window and watch it go from day to night.

Variables are primarily used with colors, and that's how you used them here. But they can be given any value and used on any property. Your project looks great!

# --hints--

You should add `--window-color1` with a value of `#777`.

```js
assert.equal(new __helpers.CSSHelp(document).getRuleListsWithinMedia("(max-width: 1000px)")?.find(x=>x.selectorText === ":root")?.style?.getPropertyValue("--window-color1")?.trim(), "#777");
```

You should add `--window-color2` with a value of `#777`.

```js
assert.equal(new __helpers.CSSHelp(document).getRuleListsWithinMedia("(max-width: 1000px)")?.find(x=>x.selectorText === ":root")?.style?.getPropertyValue("--window-color2")?.trim(), "#777");
```

You should add `--window-color3` with a value of `#777`.

```js
assert.equal(new __helpers.CSSHelp(document).getRuleListsWithinMedia("(max-width: 1000px)")?.find(x=>x.selectorText === ":root")?.style?.getPropertyValue("--window-color3")?.trim(), "#777");
```

You should add `--window-color4` with a value of `#777`.

```js
assert.equal(new __helpers.CSSHelp(document).getRuleListsWithinMedia("(max-width: 1000px)")?.find(x=>x.selectorText === ":root")?.style?.getPropertyValue("--window-color4")?.trim(), "#777");
```

# --seed--

## --seed-contents--

```html
<!DOCTYPE html>
<html lang="en">    
  <head>
    <meta charset="UTF-8">
    <title>City Skyline</title>
    <link href="styles.css" rel="stylesheet" />   
  </head>

  <body>
    <div class="background-buildings sky">
      <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>
```

```css
: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;
}

* {
  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;
}

.sky {
  background: radial-gradient(
      closest-corner circle at 15% 15%,
      #ffcf33,
      #ffcf33 20%,
      #ffff66 21%,
      #bbeeff 100%
    );
}

/* 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%;
}

.fb4a {
  border-top: 5vh solid transparent;
  border-left: 8vw solid var(--building-color1);
}

.fb4b {
  width: 100%;
  height: 89%;
  background-color: var(--building-color1);
  display: flex;
  flex-wrap: wrap;
}

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

.fb5 {
  width: 10%;
  height: 33%;
  position: relative;
  right: 10%;
  background: repeating-linear-gradient(
      var(--building-color2),
      var(--building-color2) 5%,
      transparent 5%,
      transparent 10%
    ),
    repeating-linear-gradient(
      90deg,
      var(--building-color2),
      var(--building-color2) 12%,
      var(--window-color2) 12%,
      var(--window-color2) 44%
    );
}

.fb6 {
  width: 9%;
  height: 38%;
  background: repeating-linear-gradient(
      90deg,
      var(--building-color3),
      var(--building-color3) 10%,
      transparent 10%,
      transparent 30%
    ),
    repeating-linear-gradient(
      var(--building-color3),
      var(--building-color3) 10%,
      var(--window-color3) 10%,
      var(--window-color3) 30%
    );
}

@media (max-width: 1000px) {
--fcc-editable-region--
  :root {
    --building-color1: #000;
    --building-color2: #000;
    --building-color3: #000;
    --building-color4: #000;
  }
--fcc-editable-region--
  .sky {
    background: radial-gradient(
        closest-corner circle at 15% 15%,
        #ccc,
        #ccc 20%,
        #445 21%,
        #223 100%
      );
  }
}
    
```

# --solutions--

```html
<!DOCTYPE html>
<html lang="en">    
  <head>
    <meta charset="UTF-8">
    <title>City Skyline</title>
    <link href="styles.css" rel="stylesheet" />   
  </head>

  <body>
    <div class="background-buildings sky">
      <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>
```

```css
: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;
}

* {
  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;
}

.sky {
  background: radial-gradient(
      closest-corner circle at 15% 15%,
      #ffcf33,
      #ffcf33 20%,
      #ffff66 21%,
      #bbeeff 100%
    );
}

/* 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%;
}

.fb4a {
  border-top: 5vh solid transparent;
  border-left: 8vw solid var(--building-color1);
}

.fb4b {
  width: 100%;
  height: 89%;
  background-color: var(--building-color1);
  display: flex;
  flex-wrap: wrap;
}

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

.fb5 {
  width: 10%;
  height: 33%;
  position: relative;
  right: 10%;
  background: repeating-linear-gradient(
      var(--building-color2),
      var(--building-color2) 5%,
      transparent 5%,
      transparent 10%
    ),
    repeating-linear-gradient(
      90deg,
      var(--building-color2),
      var(--building-color2) 12%,
      var(--window-color2) 12%,
      var(--window-color2) 44%
    );
}

.fb6 {
  width: 9%;
  height: 38%;
  background: repeating-linear-gradient(
      90deg,
      var(--building-color3),
      var(--building-color3) 10%,
      transparent 10%,
      transparent 30%
    ),
    repeating-linear-gradient(
      var(--building-color3),
      var(--building-color3) 10%,
      var(--window-color3) 10%,
      var(--window-color3) 30%
    );
}

@media (max-width: 1000px) {
  :root {
    --building-color1: #000;
    --building-color2: #000;
    --building-color3: #000;
    --building-color4: #000;
    --window-color1: #777;
    --window-color2: #777;
    --window-color3: #777;
    --window-color4: #777;
  }
  .sky {
    background: radial-gradient(
        closest-corner circle at 15% 15%,
        #ccc,
        #ccc 20%,
        #445 21%,
        #223 100%
      );
  }
}

```
