how do i convert an ontouch to an onclick for a morph from a GUI?

I made a morph with multiple parts that when touched the player becomes it. Now I'm trying to make an onclick version with a GUI local script. I have tried to rearrange the script multiple times but the morph still doesn't appear when I touch the GUI. Can anyone spot any mistakes I have made in my script?

(Steven2mid is the middle of the morph and Steven2 I the chest containing the parts) output: 16:40:07.371 - Steven2 is not a valid member of Frame 16:40:07.373 - Stack Begin 16:40:07.374 - Script 'Players.EarlGrey2014.PlayerGui.stevengui.stevenframe.TextButton.LocalScript', Line 3 16:40:07.375 - Stack End

Local script:

function onClick()
    if game.Players.LocalPlayer.Character:findFirstChild("Steven2") == nil then
        local g = script.Parent.Parent.Steven2:clone()
        g.Parent = game.Players.LocalPlayer.Character
        local C = g:GetChildren()
        for i=1, #C do
            if C[i].className == "Part" or "Union" then
                local W = Instance.new("Weld")
                W.Part0 = g.Steven2mid
                W.Part1 = C[i]
                local CJ = CFrame.new(g.Steven2mid.Position)
                local C0 = g.Steven2mid.CFrame:inverse()*CJ
                local C1 = C[i].CFrame:inverse()*CJ
                W.C0 = C0
                W.C1 = C1
                W.Parent = g.Steven2mid
            end
                local Y = Instance.new("Weld")
                Y.Part0 = game.Players.LocalPlayer.Character.Torso
                Y.Part1 = g.Steven2mid
                Y.C0 = CFrame.new(0, 0, 0)
                Y.Parent = Y.Part0
        end

        local h = g:GetChildren()
        for i = 1, # h do
            if h[i].className == "Part" or "Union" then
                h[i].Anchored = false
                h[i].CanCollide = false
            end
        end

    end
end

script.Parent.MouseButton1Click:connect(onClick)