I try make the same that prof Hwang do in original applet that i drag by mouse
The mass to control in size of circular how ever i copy code from original applet with modified from me in initialization page
But work first time only and after i cant control in size of circular so i restor EJS and run again work applet and i drag circular
For control in size of circular.
Second test no work again can you prof Hwang check code that i do.