Attempt to index a nil value error?

This local script is suppost to locally (fe is on) suumon some parts and tween its size but for some reason it doesn't and prints out

Attempt to index a nil value

Could anyone fix this script? Thanks in advanced!

local on = false

script.Parent.MouseButton1Click:Connect(function()
    if on==false then
        on=true
        local clone = game.ServerStorage.BarsFrontz:Clone()
        clone.Parent = workspace
        for i,v in pairs(clone:GetChildren()) do
            local function sizeTween(name, arg1, arg2)
                print("Answer is "..name.." agr1 "..arg1.." arg 2".. arg2)
                v:FindFirstChild(name).SurfaceGui.DroppingFrame.NUM1:TweenSize(UDim2.new(0, 100,0,math.random(-game.Workspace.SoundFolder.GLOBAL_SOUND.PlaybackLoudness*tonumber(arg1),-game.Workspace.SoundFolder.GLOBAL_SOUND.PlaybackLoudness*tonumber(arg2))),"Out","Linear",0.05,false)
                v:FindFirstChild(name).SurfaceGui.DroppingFrame.NUM2:TweenSize(UDim2.new(0, 100,0,math.random(-game.Workspace.SoundFolder.GLOBAL_SOUND.PlaybackLoudness*tonumber(arg1),-game.Workspace.SoundFolder.GLOBAL_SOUND.PlaybackLoudness*tonumber(arg2))),"Out","Linear",0.05,false)
                v:FindFirstChild(name).SurfaceGui.DroppingFrame.NUM3:TweenSize(UDim2.new(0, 100,0,math.random(-game.Workspace.SoundFolder.GLOBAL_SOUND.PlaybackLoudness*tonumber(arg1),-game.Workspace.SoundFolder.GLOBAL_SOUND.PlaybackLoudness*tonumber(arg2))),"Out","Linear",0.05,false)
                v:FindFirstChild(name).SurfaceGui.DroppingFrame.NUM4:TweenSize(UDim2.new(0, 100,0,math.random(-game.Workspace.SoundFolder.GLOBAL_SOUND.PlaybackLoudness*tonumber(arg1),-game.Workspace.SoundFolder.GLOBAL_SOUND.PlaybackLoudness*tonumber(arg2))),"Out","Linear",0.05,false)
                v:FindFirstChild(name).SurfaceGui.DroppingFrame.NUM5:TweenSize(UDim2.new(0, 100,0,math.random(-game.Workspace.SoundFolder.GLOBAL_SOUND.PlaybackLoudness*tonumber(arg1),-game.Workspace.SoundFolder.GLOBAL_SOUND.PlaybackLoudness*tonumber(arg2))),"Out","Linear",0.05,false)
                v:FindFirstChild(name).SurfaceGui.DroppingFrame.NUM6:TweenSize(UDim2.new(0, 100,0,math.random(-game.Workspace.SoundFolder.GLOBAL_SOUND.PlaybackLoudness*tonumber(arg1),-game.Workspace.SoundFolder.GLOBAL_SOUND.PlaybackLoudness*tonumber(arg2))),"Out","Linear",0.05,false)
                v:FindFirstChild(name).SurfaceGui.DroppingFrame.NUM7:TweenSize(UDim2.new(0, 100,0,math.random(-game.Workspace.SoundFolder.GLOBAL_SOUND.PlaybackLoudness*tonumber(arg1),-game.Workspace.SoundFolder.GLOBAL_SOUND.PlaybackLoudness*tonumber(arg2))),"Out","Linear",0.05,false)
            end
            local name = {
                [1] = {"Type1"},
                [2] = {"Type2"},
                [3] = {"Type3"},
                [4] = {"Type4"},
                [5] = {"Type5"},
                [6] = {"Type6"},
                [7] = {"Type7"},
                [8] = {"Type8"},
                [9] = {"Type9"},
                [10] = {"Type10"},

            }
            script.Parent.Text = "Mobile Front: On"
            for i=1, 20 do
                local choice = math.random(1, #name)
                v.Name = choice
            end
            while wait() do
                print("DFODFODJFODJFPOSJFOAJD")
                if v.Name == "1"then
                    sizeTween("1", 3, 1)
                elseif v.Name == "5" then   
                    sizeTween("5", 3, 1)
                elseif v.Name == "2" then   
                    sizeTween("2", 3, 1)
                elseif v.Name == "3"then
                    sizeTween("3", 5, 2)
                elseif v.Name == "4" then
                    sizeTween("4", 5, 2)
                elseif v.Name == "2" then
                    sizeTween("2", 2, 1)
                elseif v.Name == "6" then
                    sizeTween("6", 6, 3)
                elseif v.Name == "8" then
                    sizeTween("8", 6, 3)
                end
            end
        end

    elseif on==true then
        on=false
        game.Workspace:WaitForChild("BarsFrontz"):Destroy()
        script.Parent.Text = "Mobile Front: Off"
    end
end)