I have this old casino script, here is the rolling part:

Code (Text):

1.  
2. loop 30 times:
3.                     set {_random} to a random integer between 0 and 1000
4.                     #broadcast "%{_random}%"
5.                     if {_random} is between 0 and 450:
6.                         add 1 of iron block named "&6&l250$" to {_ARRAY::*}
7.                     else if {_random} is between 450 and 700:
8.                         add 1 of gold block named "&6&l400$" to {_ARRAY::*}
9.                     else if {_random} is between 700 and 895:
10.                         add diamond block named "&6&l750$" to {_ARRAY::*}      
11.                     else if {_random} is between 895 and 995:
12.                         add emerald block named "&6&l1000$" to {_ARRAY::*}          
13.                     else if {_random} is between 995 and 1000:
14.                         add glowing dragon egg named "&6&l50000$" to {_ARRAY::*}
15.                     open chest inventory with 3 row named "&f&lCASINO &8&l- &7&lIRON" to player
16.                     wait 1 tick
17.                     format gui slot 4 of player with emerald named "&6&l✿ &fPRÆMIE &6&l✿" to do nothing
18.                     format gui slot 4+18 of player with emerald named "&6&l✿ &fPRÆMIE &6&l✿" to do nothing
19.                     loop {_ARRAY::*}:
20.                         #broadcast "%loop-index%"
21.                         delete {_quit}
22.                         if (loop-index-1 parsed as an integer) > 24:
23.                             set {_quit2} to true
24.                         if {_quit2} is not true:
25.                             set {_num} to 1
26.                             loop 7 times:
27.                                 if player is sneaking:
28.                                     stop
29.                                 if {_quit} is not true:
30.                                    
31.                                     set {_index} to (loop-index-1 parsed as an integer) + {_num}-1
32.                                     set {_amount} to {_index}-64
33.                                     format gui slot {_num} +9 of player with {_ARRAY::%{_index}%}
34.                                     add 1 to {_num}
35.                                     if {_index} >= 30:
36.                                         set {_quit} to true
37.                                 play "WOOD_CLICK" to player
38.                             if {_index} is between 0 and 15:
39.                                 wait 2 ticks
40.                             else if {_index} is between 15 and 20:
41.                                 wait 3 ticks                              
42.                             else if {_index} is between 20 and 25:
43.                                 wait 4 ticks                                  
44.                             else if {_index} is 26,27 or 28:
45.                                 wait 5 ticks          
46.                             else if {_index} is 29:
47.                                 wait 6 ticks  
48.                             else:
49.                                 wait 7 ticks
50.                 if {_ARRAY::27} is iron block:
51.                     send "&8&L[ &6&lCASINO &8&l] &fDu vandt &a250$"
52.                     add 250 to player's balance
53.                 else if {_ARRAY::27} is gold block:
54.                     send "&8&L[ &6&lCASINO &8&l] &fDu vandt &a400$"
55.                     add 400 to player's balance
56.                 else if {_ARRAY::27} is diamond block:
57.                     send "&8&L[ &6&lCASINO &8&l] &fDu vandt &a750$"
58.                     add 750 to player's balance
59.                 else if {_ARRAY::27} is emerald block:
60.                     send "&8&L[ &6&lCASINO &8&l] &fDu vandt &a1000$"
61.                     add 1000 to player's balance
62.                 if {_ARRAY::27} is dragon egg:
63.                     send "&8&L[ &6&lCASINO &8&l] &fDu vandt &a50000$"
64.                     add 50000 to player's balance
65.                 play "BAT_TAKEOFF" to player  
66.                 wait 2 second    

If you decide to use it i would recommend you edited the script to use set slot instead of TuSKe guis (The script requires TuSKe if you dont switch).

 

You need to change all the "format gui slot".

here is a guide on how to use set slot:

https://forums.skunity.com/threads/vanilla-guis.8939/