Trying to make a math.random Function but it's not working correctly??

Ok so the script worked before I added the math.random lines but I'm trying to make a frame appear in PlayerGui if the random numbers equal 1 or 2 but can't seem to make it work, I'm getting no errors?

local Humanoid = script.Parent.Enemy
num = nil
function PwntX_X() 
local tag = Humanoid:findFirstChild("creator")
    if tag ~= nil then 
        if tag.Value ~= nil then 
local Leaderstats = tag.Value:findFirstChild("PlayerGui") 
            if Leaderstats ~= nil then
    function GetDaNumba()
num = math.random(1,3)
if num == 1 or num == 2 then
Leaderstats.MonsterItem.Box.Visible = true 
script:remove()
            end 
        end 
    end 
end 
end
end
Humanoid.Died:connect(PwntX_X) 
GetDaNumba()