--Hi Your Welcome!

function AutoSpeak(t)
        game:GetService("StarterGui"):SetCore("ChatMakeSystemMessage",{
        Text= t; -- Required. Has to be a string!
        Color=Color3.new(188,188,0); -- Hi
        Font=Enum.Font.SourceSansBold; -- Optional
        FontSize=Enum.FontSize.Size20; -- Optional
})
end

AutoSpeak("Hi! Today I Show You Me!")