How to configure so bases spawn within a given interval

Hey, just as the title says, how can I exactly program it so that the plugin will spawn bases at given intervals say between 30-60 minutes so that it doesn't just spawn the max allowed all at once. 

heya. scheduled events section in the config. set Enabled to true

Every Min Seconds to 1800

Every Max Seconds to 3600

Max To Spawn At Once set to 1, or stagger them with Time To Wait Between Spawns

Perfect, thank you. And one more question, how do I get it to stop announcing the bases in global chat? I seemed to have turned it on and can't remember what line I edited.

no problem. Event Messages section of the config. that one is Opened Message

Changed Status from Pending to Closed