una/template/_header_js_spinner.html

<script language="javascript">
    var bUseSvgLoading = false;
    var sUseSvgLoading = '';
    if(!bUseSvgLoading) {
        var aSpinnerOpts = {
            lines: 7, // The number of lines to draw
            length: 0, // The length of each line
            width: 8, // The line thickness
            radius: 7, // The radius of the inner circle
            corners: 1, // Corner roundness (0..1)
            rotate: 0, // The rotation offset
            direction: 1, // 1: clockwise, -1: counterclockwise
            color: '#3a8686', // #rgb or #rrggbb or array of colors
            speed: 1, // Rounds per second
            trail: 60, // Afterglow percentage
            shadow: false, // Whether to render a shadow
            hwaccel: false, // Whether to use hardware acceleration
            className: 'bx-sys-spinner', // The CSS class to assign to the spinner
            zIndex: 2e9, // The z-index (defaults to 2000000000)
            top: '50%', // Top position relative to parent in px
            left: '50%' // Left position relative to parent in px
        };

        var aSpinnerSmallOpts = $.extend({}, aSpinnerOpts, {
            lines: 6,
            width: 6,
            radius: 4,
            color: '#333',
            top: '50%',
            left: 'calc(100% - 20px)'
        });
    }
</script>