local InfectionHealth = script.Parent.Parent.Parent.InfectionStuff.InfectedHealth
local Gui = script.Parent.Frame.IFHB
InfectionHealth.Changed:Connect(function()
Gui.Size = UDim2.new(InfectionHealth.Value,.9,Gui.Size.Y.Scale,Gui.Size.Y.Offset)
end)
And please, on the future, try debugging on yourself.