                     new go.TextBlock({
                        // each tick label
                        interval: 4,
                        alignmentFocus: go.Spot.Center,
                        font: 'bold italic 14pt sans-serif',
                        stroke: 'white',
                        segmentOffset: new go.Point(0, 30)
                      })
                    ),
                  new go.TextBlock({
                    alignment: new go.Spot(0.5, 0.9),
                    stroke: 'white',