How to plot a potential energy distribution figure in MS

Hello everyone,

I used MS to build an amorphous cell of a mixture with A (10), B(8) and C(20). 

Followed by geometry optimization and NPT and NVT for 100ps, and I got the final frame of the mixture.

I would like to study the ABC distribution pattern in the mixture. So my question is how to plot a figure to show the potential energy distribution related to the position, like the figure below. Or better ideas are greatly appreciated.

Thanks in advance.
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