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---
id: 619d33c51140292cc5a21742
title: Step 100
challengeType: 0
dashedName: step-100
---
# --description--
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Usa l'animazione `wave` sul braccio sinistro. L'animazione dovrebbe durare `3s` , iterare infinitamente e avere una funzione di temporizzazione lineare.
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# --hints--
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Dovresti dare `.arm.left` una proprietà `animation-name` con il valore `--fcc-expected--` invece di `--fcc-actual--` .
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```js
assert.equal(new __helpers.CSSHelp(document).getStyle('.arm.left')?.animationName, 'wave');
```
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Dovresti dare a `.arm.left` una proprietà `animation-duration` con il valore `--fcc-expected--` invece di `--fcc-actual--` .
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```js
assert.equal(new __helpers.CSSHelp(document).getStyle('.arm.left')?.animationDuration, '3s');
```
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Dovresti dare a `.arm.left` una proprietà `animation-iteration-count` con il valore `--fcc-expected--` invece di `--fcc-actual--` .
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```js
assert.equal(new __helpers.CSSHelp(document).getStyle('.arm.left')?.animationIterationCount, 'infinite');
```
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Dovresti dare a `.arm.left` una proprietà `animation-timing-function` con il valore `--fcc-expected--` invece di `--fcc-actual--` .
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```js
assert.equal(new __helpers.CSSHelp(document).getStyle('.arm.left')?.animationTimingFunction, 'linear');
```
# --seed--
## --seed-contents--
```html
<!DOCTYPE html>
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< html lang = "en" >
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< head >
< meta charset = "UTF-8" / >
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< link rel = "stylesheet" href = "./styles.css" / >
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< title > Penguin< / title >
< meta name = "viewport" content = "width=device-width, initial-scale=1.0" / >
< / head >
< body >
< div class = "left-mountain" > < / div >
< div class = "back-mountain" > < / div >
< div class = "sun" > < / div >
< div class = "penguin" >
< div class = "penguin-head" >
< div class = "face left" > < / div >
< div class = "face right" > < / div >
< div class = "chin" > < / div >
< div class = "eye left" >
< div class = "eye-lid" > < / div >
< / div >
< div class = "eye right" >
< div class = "eye-lid" > < / div >
< / div >
< div class = "blush left" > < / div >
< div class = "blush right" > < / div >
< div class = "beak top" > < / div >
< div class = "beak bottom" > < / div >
< / div >
< div class = "shirt" >
< div > 💜< / div >
< p > I CSS< / p >
< / div >
< div class = "penguin-body" >
< div class = "arm left" > < / div >
< div class = "arm right" > < / div >
< div class = "foot left" > < / div >
< div class = "foot right" > < / div >
< / div >
< / div >
< div class = "ground" > < / div >
< / body >
< / html >
```
```css
:root {
--penguin-face: white;
--penguin-picorna: orange;
--penguin-skin: gray;
}
body {
background: linear-gradient(45deg, rgb(118, 201, 255), rgb(247, 255, 222));
margin: 0;
padding: 0;
width: 100%;
height: 100vh;
overflow: clip;
}
.left-mountain {
width: 300px;
height: 300px;
background: linear-gradient(rgb(203, 241, 228), rgb(80, 183, 255));
position: absolute;
transform: skew(0deg, 44deg);
z-index: 2;
margin-top: 100px;
}
.back-mountain {
width: 300px;
height: 300px;
background: linear-gradient(rgb(203, 241, 228), rgb(47, 170, 255));
position: absolute;
z-index: 1;
transform: rotate(45deg);
left: 110px;
top: 225px;
}
.sun {
width: 200px;
height: 200px;
background-color: yellow;
position: absolute;
border-radius: 50%;
top: -75px;
right: -75px;
}
.penguin {
width: 300px;
height: 300px;
margin: auto;
margin-top: 75px;
z-index: 4;
position: relative;
}
.penguin * {
position: absolute;
}
.penguin-head {
width: 50%;
height: 45%;
background: linear-gradient(
45deg,
var(--penguin-skin),
rgb(239, 240, 228)
);
border-radius: 70% 70% 65% 65%;
top: 10%;
left: 25%;
z-index: 1;
}
.face {
width: 60%;
height: 70%;
background-color: var(--penguin-face);
border-radius: 70% 70% 60% 60%;
top: 15%;
}
.face.left {
left: 5%;
}
.face.right {
right: 5%;
}
.chin {
width: 90%;
height: 70%;
background-color: var(--penguin-face);
top: 25%;
left: 5%;
border-radius: 70% 70% 100% 100%;
}
.eye {
width: 15%;
height: 17%;
background-color: black;
top: 45%;
border-radius: 50%;
}
.eye.left {
left: 25%;
}
.eye.right {
right: 25%;
}
.eye-lid {
width: 150%;
height: 100%;
background-color: var(--penguin-face);
top: 25%;
left: -23%;
border-radius: 50%;
}
.blush {
width: 15%;
height: 10%;
background-color: pink;
top: 65%;
border-radius: 50%;
}
.blush.left {
left: 15%;
}
.blush.right {
right: 15%;
}
.beak {
height: 10%;
background-color: var(--penguin-picorna);
border-radius: 50%;
}
.beak.top {
width: 20%;
top: 60%;
left: 40%;
}
.beak.bottom {
width: 16%;
top: 65%;
left: 42%;
}
.shirt {
font: bold 25px Helvetica, sans-serif;
top: 165px;
left: 127.5px;
z-index: 1;
color: #6a6969 ;
}
.shirt div {
font-weight: initial;
top: 22.5px;
left: 12px;
}
.penguin-body {
width: 53%;
height: 45%;
background: linear-gradient(
45deg,
rgb(134, 133, 133) 0%,
rgb(234, 231, 231) 25%,
white 67%
);
border-radius: 80% 80% 100% 100%;
top: 40%;
left: 23.5%;
}
.penguin-body::before {
content: "";
position: absolute;
width: 50%;
height: 45%;
background-color: var(--penguin-skin);
top: 10%;
left: 25%;
border-radius: 0% 0% 100% 100%;
opacity: 70%;
}
.arm {
width: 30%;
height: 60%;
background: linear-gradient(
90deg,
var(--penguin-skin),
rgb(209, 210, 199)
);
border-radius: 30% 30% 30% 120%;
z-index: -1;
}
--fcc-editable-region--
.arm.left {
top: 35%;
left: 5%;
transform-origin: top left;
transform: rotate(130deg) scaleX(-1);
}
--fcc-editable-region--
.arm.right {
top: 0%;
right: -5%;
transform: rotate(-45deg);
}
@keyframes wave {
10% {
transform: rotate(110deg) scaleX(-1);
}
20% {
transform: rotate(130deg) scaleX(-1);
}
30% {
transform: rotate(110deg) scaleX(-1);
}
40% {
transform: rotate(130deg) scaleX(-1);
}
}
.foot {
width: 15%;
height: 30%;
background-color: var(--penguin-picorna);
top: 85%;
border-radius: 50%;
z-index: -1;
}
.foot.left {
left: 25%;
transform: rotate(80deg);
}
.foot.right {
right: 25%;
transform: rotate(-80deg);
}
.ground {
width: 100vw;
height: 400px;
background: linear-gradient(90deg, rgb(88, 175, 236), rgb(182, 255, 255));
z-index: 3;
position: absolute;
margin-top: -58px;
}
```