why doesn't this work? (I get a bunch of things mentioning indenting and invalid line)

[Jasper1229]

on join:
if {Joins::*} does not contain player's uuid:
add player's uuid to {Joins::*}
add 1 to {uniqueJoins}
set join message to " "
broadcast "&a%player%&6 joined for the first time! Welcome to ArsenalMC! &8[&b##%size of {joins::*}%&8]"
else:
set join message to " "
broadcast "&a%player%&6 joined the server!"

stop

command /resetjoins:
permission: joins.resetjoins
permission message: "You can't do that (this requires joins.resetjoins)"
trigger:
delete {Joins::*}
send "&cDeleted joins. I hope you are happy with yourself" to player
stop

command /checkjoins
permission: joins.checkjoins
permission message: "You can't do that (this requires joins.checkjoins)"
trigger:
send "&bYou have &8[&b##%size of {joins::*}%&8]&b joins" to player
stop

 

[Dogloverblue]

on join:
  if {Joins::*} does not contain player's uuid:
    add player's uuid to {Joins::*}
    add 1 to {uniqueJoins}
    set join message to " "
    broadcast "&a%player%&6 joined for the first time! Welcome to ArsenalMC! &8[&b##%size of {joins::*}%&8]"
  else:
    set join message to " "
    broadcast "&a%player%&6 joined the server!"
    stop

command /resetjoins:
  permission: joins.resetjoins
  permission message: "You can't do that (this requires joins.resetjoins)"
  trigger:
    delete {Joins::*}
    send "&cDeleted joins. I hope you are happy with yourself" to player
    stop

command /checkjoins:
  permission: joins.checkjoins
  permission message: "You can't do that (this requires joins.checkjoins)"
  trigger:
    send "&bYou have &8[&b##%size of {joins::*}%&8]&b joins" to player
    stop

Hopefully this fix the issue, it was just formatting I hope