Typewriter effect in Lua (unix)

typewriter.lua

function type_out(str)
  for char in string.gmatch(str, '.') do
    os.execute("sleep " .. tonumber(0.1))
    io.write(char)
    io.flush()
  end
end

-- You can now use `type_out("your string here")!`

If you want this to run on Windows, just replace line 3 with:

if n > 0 then os.execute("ping -n " .. tonumber(0.1+1) .. " localhost > NUL") end