[HELP]i can use some help here

ok so i think the titel explains it what i need now at what i need it
i'm trying to make some things in a edited powersourceco
i found how to let a npc remove and add items to ur inventory and to add exp but i don't know and can't find it on the forums or in the source

so anyone knows how that u can let a npc sometimes give u
-exp
-db
-1-500 cps

so i want a npc that gives u random prizes but i really don't know how
so i anyone could help me

TY

greetz jochemke

Should work kinda like the lotto, if i had to guess you would simple change the items to, xp or cps then add the function to a npc

i can try got nothing to loose