Loop Process

loop all players:
    add loop-player to {_listPlayers::*} #adding all players to the list variable
set {_timer} to 60 #Change this to how many seconds you need
while {_timer} > 0: #This is a timer
    message "<light blue>%{_timer}% seconds remaining" to {_listPlayers::*} #messaging time remaining to all players in the list variable, you can replace this with what you want
    wait 1 second
    subtract 1 from {_timer}
#This will not trigger until the while loop finishes
message "Game start" to {_listPlayers::*}