Loop 2 commands

[Aleehx1233]

Hi, i want to make my bot more automated, in the server i play there is the shard system what will shutdown ur island(skyblock) every 12 hours, and to reset this timing u have to go to the spawn for 10-15 minutes and it will be resetted.
Now how can I make a script that every 6 hours go to the spawn, then wait 15 minutes and then will go again in the island and it will repeat forever? Ty