Jia` Images

Each image STATE has a list of nine images, one per piece/pad pair:

Based on events, squares may display different "states".

CODE STATE Appearance Meaning ACTION:
  Normal Normal Your turn.
r Rise-up Piece rises up Anticipating touch. onMouseOver (my piece)
a Light-up Background lighted. Piece was touched; waiting for move. onClick (my piece)
a Light-up Empty square lights up. Legal move. onMouseOver (empty square)
s Landing Piece appears & settles down. Completed onClick (legal move)
d Dark Dark (Not your turn.) (wait)