(function(){
	UndoStack.register([
		{
			type: "create-scenery",
      undo: function(state){
      },
      redo: function(state){
      },
		},
		{
			type: "update-scenery",
      undo: function(state){
      },
      redo: function(state){
      },
		},
		{
			type: "destroy-scenery",
      undo: function(state){
      },
      redo: function(state){
      },
		},
		
		// 
		
		{
			type: "create-rectangle",
      undo: function(state){
      },
      redo: function(state){
      },
		},
		{
			type: "update-rectangle",
      undo: function(state){
      },
      redo: function(state){
      },
		},
		{
			type: "destroy-rectangle",
      undo: function(state){
      },
      redo: function(state){
      },
		},
		
		//

		{
			type: "update-wallpaper",
      undo: function(state){
      },
      redo: function(state){
      },
		},
		
	])
})()