Greetings. A link to the script is below provided by optio, msatter & other geniuses of this forum
https://forum.mikrotik.com/t/is-8mb-in-a-variable-from-a-txt-file-is-possible/174013/50
The lists I use are these.
$update url=https://cinsscore.com/list/ci-badguys.txt delimiter=("\n") listname=z-blocklist_CI_badguys timeout=1d
$update url=https://www.spamhaus.org/drop/drop.txt delimiter=("\_") listname=z-blocklist_SpamHaus timeout=1d
$update url=https://view.sentinel.turris.cz/greylist-data/greylist-latest.csv listname=z-blocklist_Turris delimiter=, timeout=1d heirule=http|telnet|ftp
$update url=https://lists.blocklist.de/lists/strongips.txt delimiter=("\n") listname=z-blocklist_BlocklistDE_strongips timeout=1d
$update url=https://blocklist.greensnow.co/greensnow.txt delimiter=("\n") listname=z-blocklist_GreenSnow timeout=1d