Tinkerer0042 how can I achieve it With

[thorn jungle]

What are you trying to actually do?

[magic bramble]

The XY problem is asking about your attempted solution rather than your actual problem.

[cursive heron]

I'm trying to reuse some automations (like open all the venetian blinds of my house) to achieve a similar result (like open all the venetian blinds of my house at 50%).

Without having to duplicate code

[thorn jungle]

Then you've got two options:

1. Blueprints
2. Scripts

https://www.home-assistant.io/integrations/script#passing-variables-to-scripts

https://www.home-assistant.io/docs/automation/using_blueprints/

You can also use a group of cover entities to operate on them all as one

https://www.home-assistant.io/integrations/group