chkas

That should give the same result.

@design choices: The graphic primitives built into the language - this is not useful for a general purpose language - but in beginner language this is an important motivating factor.

The aim is to offer beginners a simple and interesting entry into programming. IMO there is an unoccupied niche for this between Scratch and Python. In the days of home computer BASIC, it was easier to learn programming - you switched on the computer and with a few lines of BASIC code you could magically create a nice sine wave on the screen. Nowadays, beginners are often overwhelmed by all the complexity.

It shouldn't be that complicated. I tried it once with gravity and without limits on the edges. The cluster of stars moved around in 2d space and stars were repeatedly catapulted out, which then disappeared. Maybe you need a super gravity (black hole) in the center to keep it stable.