编写程序，利用三个水平滚动条分别调节红、绿、蓝比例，以此设定一个颜色，并将它作为前景色，在面板上画出一个该颜色的填充椭圆。(参见示例代码)

增加一组单选按钮，分别选择不同图形：实心矩形、实心椭圆、空心矩形、空心椭圆，利用上述滚动条调节得到的颜色，绘制不同的图形

-Write a program, with three horizontal scroll bar respectively adjust the red, green, blue proportion in order to set a color, and as the foreground color in the color panel to draw a filled ellipse. (See sample code) to add a group of radio buttons,　a different graph: solid rectangle, ellipse solid, hollow rectangle, hollow oval, with the above scroll to control the resulting color, draw different graphics