can someone help me with my questing system? [closed]

this is what i have so far

local Quest = script.Parent.main
local Questparts = Quest:GetChildren()

workspace.TouchPart.Touched:Connect(function(hit)
    local hum = hit.Parent:FindFirstChild("Humanoid")
    if hum then
        for i,v in pairs(Questparts) do
     if v.Quantity.Value == "Stone" then
        v.Quantity.Text = "0"
            end
        end
    end
end)