How to create facebook like loading skeleton using css? - html

Question

i am new to creating animations...and i would like to create facebook like animation for loading the screen.
What i am trying to do?
i have a card and i want to represent the loading state by using the facebook like loading (skeleton screen with animation) for the div with class "image".
The code is added here
https://codepen.io/harika123/pen/vYEdoOY
Below is the code,
.container {
display: flex;
flex-direction: row;
}
.card {
box-shadow: 3px 3px 5px 0 rgba(0, 0,0, 0.15);
width: 309px;
position: relative;
top: 200px;
left: 250px;
}
.image {
display:flex;
width: 309px;
height: 176px;
background-color: #cccccc;
}
.loading {
position: relative;
top: 80px;
left: 125px;
width: 82px;
height: 20px;
background-color: white;
border-radius: 10px;
}
h4 {
height: 30px;
}
.text {
padding-left: 16px;
}
.footer {
display: flex;
width: 309px;
height: 72px;
background-color: white;
}
<div class="container">
<div class="card">
<div class="image">
<div class="loading">
<div class="text">loading</div>
<div class="button"></div>
</div>
</div>
<div class="footer">
<div class="info">
<h4>Card Name</h4>
</div>
</div>
</div>
</div>
I have tried to add the animations but is not working (look into code from codepen). how can i add the animations like the facebook loading skeleton screen. for facebook we see left to right shimmering effect. i want it to use 90 deg linear gradient. could someone help me with this. thanks.