How to make fake arms?

This is my code, it reads no errors and my effort to fix it is no more than ineffective failing. Arms go transparent but new arms don't appear

local la = char["Left Arm"]
local la2 = la:Clone()
local ra = char['Right Arm'] -- Da pose
local ra2 = la:Clone()
--Vector3.new(la2.Rotation * CFrame.Angles(math.rad(-10), math.rad(-5), 0))


la2.Rotation = CFrame.Angles(math.rad(-10), math.rad(-5), 0)*la2.Rotation 
la2.Position = CFrame.new(0,-0.7,0.2)*la2.Position  --Y, X, Z

ra2.Rotation = CFrame.Angles(math.rad(-16), math.rad(0), math.rad(90))*ra2.Rotation
ra2.Position = CFrame.new(0.5, 0, 1.3)*ra2.Position -- x y z
local torso = char.Torso

la.Transparency = 1
ra.Transparency = 1
    local weld1 = Instance.new("Weld", la2)
    local weld2 = Instance.new("Weld", ra2)
weld1.C0 = la2.CFrame:inverse()
weld1.C1 = torso.CFrame:inverse()
weld1.Part0 = la2
weld1.Part1 = torso
weld2.C0 = ra2.CFrame:inverse()
weld2.C1 = torso.CFrame:inverse()
weld2.Part0 = ra2
weld2.Part1 = torso