                 for key, value of args
                     el.style[this._getPrefix(key)] = value
 
+            return this
+
         pause: ->
             this._paused = new Date()
             for el in this._collection

                "transition": null
            )

    window.Moon = Moon
                    el.style[this._getPrefix(key)] = computedStyle.getPropertyValue(this._getCssPrefix(key))

                el.style[this._getPrefix("transition")] = ""

            return this

        # set loop
        loop: (looping) ->
