用IDL实现的显示霓虹灯效果，不同的颜色交换显示，很漂亮的效果，但是程序很简单-Display neon effect with IDL realized exchange display different colors, very nice effect, but the program is very simple

计算机图形学 霓虹变化小程序，适合初学者参考-Computer graphics neon small changes in procedures, suitable for beginners reference