How to subtract score every minute?

[Deus Zed Machina]

I'm making a mission wherein I want to time the player and reward players that complete the mission faster with a higher score. To this end, I set the score to 10,000 at the mission's start, and now I'm trying to set it up such that it subtracts 1 point for every in-universe minute that passes. However, I'm not sure how to get this to work properly. Any suggestions?

[linuxgurugamer]

Just see how long it takes and subtract  that from the final score.

[Deus Zed Machina]

That does sound like a much easier solution, but is it even possible? As far as I can tell, you can only modify the score based on a constant value.

[Draradech]

You are correct, you can only modify score with constant values. Also, you can't have a loop running independently from your mission without disturbing it, there is no parallelism. You need to integrate a score loop before every objective node like this:

I have a display message there for debugging purposes, it can be an "always true" node. This node is the reference for the "time since" node. Those 3 need to be able to be activated multiple times, so remove the "once only" option.