How to create this specific rotating effect?

[mrchow19910319]

In this site, when you see the red logo on the screen the outer part will rotate as you scroll down the page..

 

How do I create this effect??? 

[mrchow19910319]

https://clickpivot.com/

[badreg]

Copied and pasted from https://clickpivot.com/js/script.js

 

// Spin Badge
$(window).scroll(function() {
var theta = $(window).scrollTop() / 300 % Math.PI;
$('#turn').css({ transform: 'rotate(' + theta + 'rad)' });
});