## HTML
```HTML
<div class="donut"></div>
```
## CSS
```CSS
@keyframes donut-spin {
0% { transform: rotate(0deg); }
100% { transform: rotate(360deg); }
}
.donut {
display: inline-block;
border: 4px solid rgba(0, 0, 0, 0.1);
border-left-color: #7983ff;
border-radius: 50%;
width: 30px;
height: 30px;
animation: donut-spin 1.2s linear infinite;
}
```
## Explanation
```Text
Use a semi-transparent border for the whole element, except one side that will serve as the loading indicator for the donut. Use animation to rotate the element.
```