public static void addTextError(String s){
		 StyledDocument doc = GuiWindow.textArea.getStyledDocument();

	     Style style = GuiWindow.textArea.addStyle("I'm a Style", null);
	     StyleConstants.setForeground(style, Color.red);

	     try { 
	    	 doc.insertString(doc.getLength(), s + "\n" ,style); 
	     }
	     catch (BadLocationException e){}
	}