[SOLVED] How to close these shutters at 50%

Good morning all !
all is said in the title of the subject
here I would like my lantern shutters this farm has 50%
bus_automation shutters_veranda “Living Room Shutter” [where = “07”, shutterRun = “25000”]
Rollershutter inter_veranda “Shutter [% .0f %%]” (shutter, veranda) [“Blinds”] {channel = “openwebnet: bus_automation: MYHOMESERVER1: shutters_veranda: shutter”}
I must surely create a rule but I can not find any info on it!
thank you for your answers !!

https://www.openhab.org/docs/tutorial/rules.html and https://www.openhab.org/docs/configuration/rules-dsl.html

You may also want to create a sitemap
https://www.openhab.org/docs/tutorial/sitemap.html and https://www.openhab.org/docs/configuration/sitemaps.html