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---
id: 5a9d72ad424fe3d0e10cad16
title: Use a media query to change a variable
challengeType: 0
videoUrl: 'https://scrimba.com/c/cWmL8UP'
2019-08-05 16:17:33 +00:00
forumTopicId: 301091
2021-01-13 02:31:00 +00:00
dashedName: use-a-media-query-to-change-a-variable
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---
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# --description--
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CSS Variables can simplify the way you use media queries.
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For instance, when your screen is smaller or larger than your media query break point, you can change the value of a variable, and it will apply its style wherever it is used.
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# --instructions--
In the `:root` selector of the `media query` , change it so `--penguin-size` is redefined and given a value of `200px` . Also, redefine `--penguin-skin` and give it a value of `black` . Then resize the preview to see this change in action.
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# --hints--
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`:root` should reassign the `--penguin-size` variable to `200px` .
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```js
assert(
code.match(
/media\s*?\(\s*?max-width\s*?:\s*?350px\s*?\)\s*?{[\s\S]*:root\s*?{[\s\S]*--penguin-size\s*?:\s*?200px\s*?;[\s\S]*}[\s\S]*}/gi
)
);
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```
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`:root` should reassign the `--penguin-skin` variable to `black` .
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```js
assert(
code.match(
/media\s*?\(\s*?max-width\s*?:\s*?350px\s*?\)\s*?{[\s\S]*:root\s*?{[\s\S]*--penguin-skin\s*?:\s*?black\s*?;[\s\S]*}[\s\S]*}/gi
)
);
```
# --seed--
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## --seed-contents--
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```html
< style >
:root {
--penguin-size: 300px;
--penguin-skin: gray;
--penguin-belly: white;
--penguin-beak: orange;
}
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@media (max-width: 350px) {
:root {
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/* Only change code below this line */
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/* Only change code above this line */
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}
}
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.penguin {
position: relative;
margin: auto;
display: block;
margin-top: 5%;
width: var(--penguin-size, 300px);
height: var(--penguin-size, 300px);
}
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.right-cheek {
top: 15%;
left: 35%;
background: var(--penguin-belly, white);
width: 60%;
height: 70%;
border-radius: 70% 70% 60% 60%;
}
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.left-cheek {
top: 15%;
left: 5%;
background: var(--penguin-belly, white);
width: 60%;
height: 70%;
border-radius: 70% 70% 60% 60%;
}
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.belly {
top: 60%;
left: 2.5%;
background: var(--penguin-belly, white);
width: 95%;
height: 100%;
border-radius: 120% 120% 100% 100%;
}
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.penguin-top {
top: 10%;
left: 25%;
background: var(--penguin-skin, gray);
width: 50%;
height: 45%;
border-radius: 70% 70% 60% 60%;
}
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.penguin-bottom {
top: 40%;
left: 23.5%;
background: var(--penguin-skin, gray);
width: 53%;
height: 45%;
border-radius: 70% 70% 100% 100%;
}
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.right-hand {
top: 5%;
left: 25%;
background: var(--penguin-skin, black);
width: 30%;
height: 60%;
border-radius: 30% 30% 120% 30%;
transform: rotate(130deg);
z-index: -1;
animation-duration: 3s;
animation-name: wave;
animation-iteration-count: infinite;
transform-origin:0% 0%;
animation-timing-function: linear;
}
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@keyframes wave {
10% {
transform: rotate(110deg);
}
20% {
transform: rotate(130deg);
}
30% {
transform: rotate(110deg);
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}
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40% {
transform: rotate(130deg);
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}
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}
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.left-hand {
top: 0%;
left: 75%;
background: var(--penguin-skin, gray);
width: 30%;
height: 60%;
border-radius: 30% 30% 30% 120%;
transform: rotate(-45deg);
z-index: -1;
}
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.right-feet {
top: 85%;
left: 60%;
background: var(--penguin-beak, orange);
width: 15%;
height: 30%;
border-radius: 50% 50% 50% 50%;
transform: rotate(-80deg);
z-index: -2222;
}
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.left-feet {
top: 85%;
left: 25%;
background: var(--penguin-beak, orange);
width: 15%;
height: 30%;
border-radius: 50% 50% 50% 50%;
transform: rotate(80deg);
z-index: -2222;
}
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.right-eye {
top: 45%;
left: 60%;
background: black;
width: 15%;
height: 17%;
border-radius: 50%;
}
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.left-eye {
top: 45%;
left: 25%;
background: black;
width: 15%;
height: 17%;
border-radius: 50%;
}
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.sparkle {
top: 25%;
left:-23%;
background: white;
width: 150%;
height: 100%;
border-radius: 50%;
}
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.blush-right {
top: 65%;
left: 15%;
background: pink;
width: 15%;
height: 10%;
border-radius: 50%;
}
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.blush-left {
top: 65%;
left: 70%;
background: pink;
width: 15%;
height: 10%;
border-radius: 50%;
}
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.beak-top {
top: 60%;
left: 40%;
background: var(--penguin-beak, orange);
width: 20%;
height: 10%;
border-radius: 50%;
}
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.beak-bottom {
top: 65%;
left: 42%;
background: var(--penguin-beak, orange);
width: 16%;
height: 10%;
border-radius: 50%;
}
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body {
background:#c6faf1;
}
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.penguin * {
position: absolute;
}
< / style >
< div class = "penguin" >
< div class = "penguin-bottom" >
< div class = "right-hand" > < / div >
< div class = "left-hand" > < / div >
< div class = "right-feet" > < / div >
< div class = "left-feet" > < / div >
< / div >
< div class = "penguin-top" >
< div class = "right-cheek" > < / div >
< div class = "left-cheek" > < / div >
< div class = "belly" > < / div >
< div class = "right-eye" >
< div class = "sparkle" > < / div >
< / div >
< div class = "left-eye" >
< div class = "sparkle" > < / div >
< / div >
< div class = "blush-right" > < / div >
< div class = "blush-left" > < / div >
< div class = "beak-top" > < / div >
< div class = "beak-bottom" > < / div >
< / div >
< / div >
```
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# --solutions--
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```html
< style > @ media ( max-width : 350px ) { : root { --penguin-size : 200 px ; --penguin-skin : black ; } } < / style >
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```