[![enter image description here](https://i.stack.imgur.com/ODics.png)](https://i.stack.imgur.com/ODics.png)

I need this image in CSS and inside this border a background image needed.

I have tried 

```
border-radius:0 0 50% 50%;
-webkit-border-radius:0 0 50% 50%;

```

But not getting the required shape. 

Any help would be appreciated.