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)