My script is for a Loading Screen,can anyone tell why doesnt it work ?

function PlayerAdded(np)
    sg = instance.new("ScreenGui",np.StarterGui)    
    fr = instance.new("Frame",sg)
    fr.Position = Udim2.new(0,0,0,0)
    fr.Active = false
    fr.BackgroundColor3 = Color3.new(8/255,121/255,207/255)
    fr.BackggroundTransperancy = 0
    fr.BorderPixel = 0
    fr.Name = "Loading"
    fr.Style = "RobloxRound"
    fr.Size = UDim2.new(1,1,1,1)
    fr2 = instance.new("Frame",sg)
    fr2.Position = UDim.new(0.5,0,0.4,0)
    fr2.Active = false
    fr2.BackgroundColor3 = Color3.new(207/255,13/255,55/255)
    fr2.BackgroundTransparency = 0
    fr2.BorderPixel = 0
    fr2.Name = "Loading Bar"
    fr2.Style = "RobloxSquare"
    fr2:TweenPosition(UDim2.new(0.2,0,0.4,0),"Out","Linear",5,false,nil)
    wait(5)
    sg:Destroy()

end