Check if its false or true?

script.Parent.MouseButton1Click:connect(function()
        if script.Parent.Storage.Redeemedb.Value == true then
            script.Parent.Parent.Input.Text = "Already Redeemed!"
        wait(2)
        script.Parent.Parent.Input.Text = "Enter Code Here"
else
        if script.Parent.Storage.Redeemedb.Value == false and script.Parent.Parent.Input.Text == "tankman" then
        game.Players.LocalPlayer.Character.Humanoid.MaxHealth = 200
        script.Parent.Storage.Redeemedb.Value = true
        script.Parent.Parent.Input.Text = 'Code Redeemed!'
        wait(2)
        script.Parent.Parent.Input.Text = 'Enter Code Here'
    else
        script.Parent.Parent.Input.Text = 'Code Invalid'
        wait(2)
        script.Parent.Parent.Input.Text = 'Enter Code Here'
    end
        end
end)

How would i make it to check ifits true or false then if its false check the code and if its entered wrong do code invalid and if its entered right it changes the bool to true so they cant redeem it again. right now all its doing is ill enter the wrong code on purpose then it says already redeemed how would I fix this script :(