Use the curses library
to draw a sequence of stars in snake-like order. After the
program starts, it will ask the user about the width and height, then invoke
the curses.initscr() function to start drawing.
The following is an example for Width=40 and Height=6.
You may invoke curses.curs_set(0) to hide the cursor while the program
is running. This will make the display more elegant. Be sure to invoke
curses.curs_set(2) to bring it back.
