Add staggered animation snippet

snippet-template.md

@@ -0,0 +1,34 @@
+---
+title: Snippet Name
+tags: other,intermediate
+---
+
+Explain briefly what the snippet does.
+
+```html
+<div class="my-snippet"></div>
+```
+
+```css
+.my-snippet {
+  background-color: #fff;
+  border: 1px solid #000;
+  border-radius: 4px;
+}
+```
+
+```js
+console.log(
+  "This is optional, if your snippet doesn't require JavaScript, be sure to delete this block!"
+)
+```
+
+#### Explanation
+
+- Explain briefly how the snippet works.
+- Use bullet points for your snippet's explanation.
+- Try to explain everything briefly but clearly.
+
+#### Browser support
+
+- https://www.caniuse.com/#feat=border-radius