visualization – Mesh Plot in R – Animated Visual and Static Visual

I am relatively new to data visualisation using R. However, I would like to provide a visual demonstration of how a self-organising map (SOM) learns, similar to the examples provide below.

Example 1 is a static representation, where the green grid represents an initialised map, and the blue map represents the post-training map.

Example 2 is an animated gif which iteratively shows the steps of the SOM learning process. Shown in full here:

I wondered if someone could help with how to reproduce this these types of examples in R, or direct me to reproducible code.

Would be greatly appreciated.

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