     @pointRef    = @workspaceRef.child "point"
     @linesRef    = @workspaceRef.child "lines"
     @stateRef    = @workspaceRef.child "state"
+    @usersRef    = @workspaceRef.child "users"
 
     @canvas      = new KDCustomHTMLView
       tagName    : "canvas"


    @context     = @canvas.getElement().getContext "2d"
    @drawedQueue = []

    @canvas.on "mousedown", (e) =>
      KD.utils.stopDOMEvent e

      @startDrawing = no
      @stateRef.set   no

      @drawedQueue.unshift KD.nick(), @userColors[KD.nick()]
      @linesRef.push @drawedQueue.join "|"
      @drawedQueue.length = 0

