Giving Gradient fill color based on the value.

Documentation Is:

• Missing or needed
• Confusing
• Not Sure?

Please Explain in Detail…

I need to give 3 different colors as gradient color in the background in the “line chart”. These colors should be based on the values.

value and colors

120 to 200: green color
60 yo 120 : blue color
0 to 60: Orange color.
also when no value with data above 120 is given as parameter green color should not be displayed.
I have attached the image.

Thanks,