public static void main(String[] args) {
		Display display = new Display();
		Shell shell = new Shell(display);
		FillLayout layout = new FillLayout();
		layout.marginHeight = 50;
		layout.marginWidth = 50;
		shell.setLayout(layout);

		Composite c = new Composite(shell, SWT.NONE);
		c.setBackground(display.getSystemColor(SWT.COLOR_BLUE));
		c.setLayout(new FillLayout());
		
		Composite c2 = new Composite(c, SWT.NONE);
		c2.setBackground(display.getSystemColor(SWT.COLOR_RED));

		shell.open();
		while (!shell.isDisposed()) {
			if (!display.readAndDispatch()) display.sleep();
		}
		display.dispose();
	}