German demo from the mid nineties by Bollaware.
Good effect/Good music.
https://www.youtube.com/watch?v=4a1W9aVfIt0&t=167s
Links:
https://www.cpc-power.com/index.php?page=detail&num=8499
https://cpcrulez.fr/demostestDO_circles.htm
https://cpcrulez.fr/info-bollaware.htm
https://www.cpc-power.com/index.php?page=staff&lenom=Bollaware
https://www.cpcwiki.eu/index.php/Bollaware
https://www.bollaware.de/
https://www.pouet.net/prod.php?which=10485
Not emulated - original hardware and software.
Please note that the aspect ratio for this YouTube video is 16:9 but the CPC monitor
has an aspect ratio of 4:3 so you may wish to adjust your viewing device accordingly.
Whenever I see this demo the below series comes in mind.
The sound is pretty similar I would say.
https://www.youtube.com/watch?v=7busny8OFuA&ab_channel=Christos1977gr (https://www.youtube.com/watch?v=7busny8OFuA&ab_channel=Christos1977gr)