## HTML (CSS?), 167 bytes

Inspired by [insertusernamehere's answer][1]

    <style>body{position:fixed;left:50%;top:12%;width:1px;height:75vmin;border-top:1px solid #800080;animation:r 60s infinite linear}@keyframes r{to{transform:rotate(1turn

Ungolfed:

<!-- begin snippet: js hide: false -->

<!-- language: lang-css -->

    body {
        position: fixed;
        left: 50%;
        top: 12%;
        width: 1px;
        height: 75vmin;
        border-top: 1px solid #800080;
        animation: r 60s infinite linear;
    }
    @keyframes r {
        to {
            transform: rotate(1turn);
        }
    }

<!-- end snippet -->

[1]: http://codegolf.stackexchange.com/a/62101/26575