When FillFromAbove() moves a piece downward, we now create an entry in the FallingPieces dictionary that is equivalent to the newly moved piece. The vertical offset is set to the height of a piece (40 pixels) times the number of board squares the piece was moved. For example, if the empty space was at location 5,5 on the board, and the piece above it (5,4) is being moved down one block, the animated piece is created at 5,5 with an offset of 40 pixels (5-4 = 1, times 40).

When new pieces are generated for the board, they are added with an offset equal to the height (in pixels) of the game board, determined by multiplying the GamePiece.PieceHeight value by the GameBoardHeight. This means they will always start above the playing area and fall into it.

The last type of animated piece we need to deal with adding during play is the rotation piece. This piece type is added whenever the user clicks on a game piece.