Air _King wrote:

mob
Login()
var/turf/Start/T
usr.icon='Orc.dmi'
for(T in world)
if(!T.occupied)
T.occupied=1
usr.loc=locate(/turf/Start)
new/obj/Deck(usr)

It creates tow decks because I put two starts in the world, but I don't know why it is finding it twice, please help. I wan't it top log them into the first unoccupied turf names start and create only one deck.

for(T in world) will repeat the loop twice. Since you do nothing to stop the loop from repeating, it will always loops twice.

Also, this line:
usr.loc=locate(/turf/Start)
will move the player to the first turf, no matter what T is. It might be best to use
usr.loc = T

[EDIT]
Would return 0 after new/obj/Deck(usr) work?

return 0 would make the loop stop. It would be better to use break, then you could test after the loop to be certain the player found a start square. If not, they could be moved to an audience area or something.

mob
Login()
var/turf/Start/T
usr.icon='Orc.dmi'
for(T in world)
if(!T.occupied)
T.occupied=1
usr.loc = T
new/obj/Deck(usr)
break
if(!T) // both start areas were occupied
// make them an audience member or delete them, whatever you like