on chat:
    if {%event-player%.prefix} is not set:
        set {%event-player%.prefix} to "&8Default &7"
    cancel event
    broadcast "%{%event-player%.prefix} parsed as a colored message%%player% &8- &7%message%"
command /prefix <player> <text>:
    permission: bo3.changeprefix
    trigger:
        message "&7Changed &8%arg 1%'s &7prefix to &8%arg 2%"
        set {%arg 1%.prefix} to "%arg 2e%"