MAX Level event vsro

I am wanting to make a system that bonifique certain amount of players that atigirem the desired level.
Example ...
the first 10 who reach level 90 earn certain items.
anyone have idea how to do?

write a procedure

Log the level with date and time
than make reward
BETWEEN 1 AND 20

I really did not understand.
Could you elaborate?

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with few changes in it's done ^ ^

Can you help me make the adjustments?