sts you might want a bit of gambling in the server, so try this!
https://www.youtube.com/redirect?q=http%3A%2F%2Fforums.bukkit.org%2Fthreads%2Fecon-slots-v0-6-sign-based-slot-machines-674.8409%2F&session_token=Q1CKGbF0fNF7oBfL6MV5OB5Mis58MTMxMTE3MjEwN0AxMzExMDg1NzA3
https://www.youtube.com/redirect?q=http%3A%2F%2Fforums.bukkit.org%2Fthreads%2Fecon-slots-v0-6-sign-based-slot-machines-674.8409%2F&session_token=Q1CKGbF0fNF7oBfL6MV5OB5Mis58MTMxMTE3MjEwN0AxMzExMDg1NzA3