Job: Zombie hordes

Hi want to have a zombies system where they walk into packs but are easy to kill, they run during the night and scream as hordes like in zworld but during the day the walk around slowly or stay idle or sleep on the ground they can wake up and get up if you make noise near them but if you walk slowly you can bypass them

im using storm fox addon for the weather day and night system

https://steamcommunity.com/sharedfiles/filedetails/?id=1132466603&searchtext=Stormfox

you will need to edit it so that zombie become fast and hordes at 7pm until 6am, and add text its getting dark..hordes are comming or its daytime soon zombies are becoming slower