} else if (node instanceof ConstantNode){
nodeGUI=new ConstantNodeGUI((ConstantNode)node);
} else if (node instanceof IfNode){
nodeGUI=new IfNodeGUI((IfNode)node);
} else if (node instanceof ExitNode){
nodeGUI=new ExitNodeGUI((ExitNode)node);
} else if (node instanceof OutputNode){
nodeGUI=new OutputNodeGUI((OutputNode)node);
} else if (node instanceof DifferedInputNode){
nodeGUI=new DifferedInputNodeGUI((DifferedInputNode)node);
} else if (node instanceof BlockNode){