How can i write some text the diagram - Highcharts?

How can i write some text the diagram - Highcharts?

How can i write some text on the yellow part and this should be seen only
when i click on this part? http://jsfiddle.net/r6p7E/14/
mouseOut: function () { var serie = this.points;
$.each(serie, function (i, e) {
if (!this.selected) {
this.graphic.attr({
fill: '#242c4a'
});
}
else {
this.graphic.attr({
fill: '#fefe0f',
});
}
});
}`