Scroll back to top of page on icon/image click

Site URL: http://www.dolphinbottles.co.uk

Hi,

I was hoping to know if theres any code that when you click the mini logo in the right hand corner of the page it would auto-scroll back to the top of the page?

The logo is fixed. Code is:

<div id="dolphin-logo">
<img src="https://static1.squarespace.com/static/5efca1d4b38d327351cb3a48/t/5f80623086feca1a363d3f95/1602249265109/Untitled+design+%288%29+%281%29.png" width="110" height="55">
</div>

#dolphin-logo {
position: fixed;
top: 90%;
right: 0;
left: 80%;
transform: rotate(0deg) translateX(50%);
transform-origin: 100% 0;
z-index: 99999;
}
@media screen and (max-width: 960px) {
#dolphin-logo {
bottom: 2%;
left: 40%;
top: auto;
}
}

Appreciate any help 🙂