function onAdvance(cid, skill, oldlevel, newlevel)
if(getPlayerStorageValue(cid, 99963) ~= 1 and skill == SKILL__LEVEL and newlevel >= 20) then
doPlayerAddItem(cid, xxxx)
setPlayerStorageValue(cid, 99963, 1)
doPlayerSendTextMessage(cid, 22, "You have received xxx because you reached level 20")
end
return TRUE
end