one for you jsFiddle now answering your question
series: [{ name: 'Region 1', zIndex: 1000, data: [[0, -3 ],[0,3],[1, -5] ,[1,5],[2, -4],[2,4],[3, -3],[3,3]] },{ name: 'Region 2', data: [[0, -4] ,[0,4],[1, -2],[1,2],[2, -6],[2,6],[3, -4],[3,4]] },{ name: 'Region 3', data: [[0, -3],[0,3],[1, -5],[1,5],[2, -4],[2,4],[3, -3],[3,3]] }]
WORK jsFiddle