   // "tron" case
                        if(this.$.data('skin') == 'tron') {

                            this.cursorExt = 0.3;

                            var a = this.arc(this.cv)  // Arc
                                , pa                   // Previous arc
                                , r = 1;

                            this.g.lineWidth = this.lineWidth;

                            if (this.o.displayPrevious) {
                                pa = this.arc(this.v);
                              