How to create a step graph?

I have already reviewed the documentation and following it I can't get the desider result. What I am able to achieve it far differnt from what I need. Please see the inteface code here:
=a!lineChartField(
categories: {0, 100, 101, 200, 201, 300, 301, 400, 401, 500},
series: {
a!chartSeries(label: "Discount", data: {2, 2, 4, 4, 6,6, 8,8,10,10})
},
xAxisTitle: "Sales threshold",
yAxisTitle: "Discount %",
showLegend: false
)

Could you send me an example that will present exactly what I sent?

I have already reviewed the documentation and following it I can't get the desider result. What I am able to achieve it far differnt from what I need. Please see the inteface code here:
=a!lineChartField(
categories: {0, 100, 101, 200, 201, 300, 301, 400, 401, 500},
series: {
a!chartSeries(label: "Discount", data: {2, 2, 4, 4, 6,6, 8,8,10,10})
},
xAxisTitle: "Sales threshold",
yAxisTitle: "Discount %",
showLegend: false
)

Could you send me an example that will present exactly what I sent?