You have to add extra targetRects in your TargetSet.
For example, if you are displaying 3 (three) items, thentargetSet.targetRects = [
{ ... rectX ... }, ' "invisible" rectangle for avoiding flashing last item
{ ... rect1 ... }, ' rectangle for item 1
{ ... rect2 ... }, ' rectangle for item 2
{ ... rect3 ... }, ' rectangle for item 3
{ ... rectY ... }, ' "invisible" rectangle for avoiding flashing last item
]
Hope this helps.