Yes, and yes. Thank you guys so much for such a quick help and an explanation. I will try to learn more about what I'm trying to do next time before doing it.

Hello !

I'm trying to make a small mod, but it even it's current state it gives me an error.
script.on_event(defines.events.on_console_chat, function(event)
message = new_message
if new_message == "baza" then
data.raw.unit-spawner["biter-spawner"].health = 0
data.raw.unit-spawner["spitter-spawner ...