Advice on building a simple robot

Hello,

I would like to build a simple robot for an art project. The robot basically needs to be able to move in 4 directions (e.g. north, south, east, west) and needs to be relatively precise (maybe ±1mm). The actions can be pre-programmed if that makes it easier.

I have seen some of the kits in the FAQ section, but they seem quite expensive and over complicated for the kind of thing I’m trying to do. Would there be a simpler way of achieving this? I have a physics degree and some knowledge of coding.

Thank you in advance

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