the inner circle
        , scale: 0.25 // Scales overall size of the spinner
        , corners: 1 // Corner roundness (0..1)
        , color: '#000' // #rgb or #rrggbb or array of colors
        , opacity: 0.15 // Opacity of the lines
        , rotate: 0 // The rotation offset
        , direction: 1 // 1: clockwise, -1: counterclockwise
        , speed: 1 // Rounds per second
        , trail: 60 // Afterglow percentage
        , fps: 20 // Frames per second when using setTimeout() as a fallback for CSS
    