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 http://www.phy.ntnu.edu.tw/ 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