If you have doubts about if robots could ever take over human beings, then you should really take a look at creations like the LEGO Mindstorms Guitar Robot designed and built by YouTuber Fastythefastcat.
The creator says he won’t be posting the instructions, though, since he used a kid-sized smaller guitar with some idiosyncrasies that wouldn’t hold up with other guitars, so it probably wouldn’t work that well without being adapted for the specific instrument.
Why? Because it strums a guitar, complete with cord manipulation, to a tune and it is made out of freaking LEGO!
The robot was specifically created to play this song, but it could be reprogrammed to play others that use the same cords.