It can be both. Traditionally is was a 'war dance', but depending on the lyrics and context it can be used as welcoming, a farewell, or many such things. You would have to translate it to know.
ligma_centauri
joined 18 hours ago
Given how terrible the amazon search functionality is, I don't see how this would work. There is an overwhelming number of products available there, so it is easy to find what you're after eventually, but in my experience, the only way to actually find a specific product is with an external search engine.
My normal search pattern goes something like: pricespy/digikey/RS/mouser > if not available, or too expensive> aliexpress > if too much to sift through > google shopping > (this is where amazon links live)
To get a step deeper into your "how can a machine draw a circle" question. Mostly it can't. Even with an open-loop control system dragging the 'pen' at a fixed angle, you would need to have defined that curve in software somewhere, where it will be a barely-noticable set of X-Y steps, not a pure curve, otherwise you cannot be sure it would return to the origin.
Luckily, you only need a few decimals of pi to approximate that far beyond what any human eye could discern.
Break any digitally defined curve down far enough and you will see those discrete steps, but with modern technology, we just never notice it.