Pet rarity system

local RarityTable = {
    Common = 45;

    Rare = 35;

    Epic = 18;

    Legendary = 2; -- these rarities are changeable. Change the numbers how ever you want them!
}

local weight = 0

for _, Chance in pairs(RarityTable) do
    weight += (Chance)
end.

local ranNum = math.random(1, weight)

weight = 0
for Rarity, Chance in pairs(RarityTable) do
    weight += (Chance)

    if weight >= ranNum then
        print("Rarity "..Rarity.." has been discovered!")
        break
    end
end