anychart.onDocumentReady(function() {
var chart = anychart.pie([
{x: "Identity", value: 3},
{x: "Non-contradiction", value: 3},
{x: "Excluded middle", value: 3}
labels.background().enabled(true);
labels.background().fill("Black 0.4");
chart.title("Labels size");
chart.container("container");