May you attach images for what you want , for me can have idea, i can also modified applet for be like you want, but as i said will be helpful
that you attach some images show the object that you want, this help  professor Hwang, lookang and me to help  you.

For example here is a simple modified i done, the original applet created by prof Hwang.

/htdocs/ntnujava/ejsuser/37048/users/Eg/ahmed/satmotion_pkg/satmotion.propertiesFull screen applet or Problem viewing java?Add to exception site list
Press the Alt key and the left mouse button to drag the applet off the browser and onto the desktop. This work is licensed under a Creative Commons Attribution 2.5 Taiwan License
Download EJS jar file(2606.6kB):double click downloaded file to run it. (3 times by 2 users) , Download EJS source View EJS source