best way to make morph a player into a rthro character?

im trying to make a morph button that changes a players character into the rthro character without killing them, this is just the test script and when it executes, you teleport to where the original model is and die instanly. any suggestions?

local modle = workspace.RTHROT:GetChildren()

game.Players.PlayerAdded:Connect(function(plr)
    wait(3)
    for i,v in pairs(plr.Character:GetChildren())do
        if v.Name =="Humanoid" then
        else
        v:Destroy()         
        end
    end

    for i,v in pairs(modle)do
        if v.Name == "Humanoid" then else
            local clone = v:Clone()
            clone.Parent = plr.Character
        end
    end


end)