Simple time updated point, try it here: http://elm-lang.org/try

simpleTimeUpdatedPoint.elm

import Graphics.Element exposing (Element, show)
import Signal exposing (Signal, map, foldp)
import Time exposing (fps)

type alias Point = {x: Float, y: Float}

main : Signal Element
main =
  map show <| foldp update {x=0, y=0} (fps 30)

update : Float -> Point -> Point
update dt g =
  {g | x <- g.x + dt}