Algodoo

There's no video or anything just an explanation on how you can do it yourself
I could make a video on my youtube channel (if I still have my computer by the time I record)
thamks bai
I am open to recieving personal records as long you can showhow you did it whether you explain it, or show CSVs, plots of X, Y over time, or a video.
no changing sim frequency, but you can change sim speed
TAS (Tool-Assisted Speedruns) are accepted as long as TAS is mentioned in your scene, plot or comment.