PATTERN:
^[.](([0-9]*[neswud]+)+)\s*$

SCRIPT:
-- allows you to write speedwalk strings starting with period
-- eg .5seeen;;open door;;.ssen

for match in rex.gmatch(matches[2],"([0-9]*[neswud])") do
  for i = 1, (rex.match(match,"[0-9]+") or 1) do
    send(rex.match(match,"[a-z]"),false)
  end
end