open

Type: public void

Opens the box; gives the player whatever is inside it.

next

Type: public Matrix

Calculates the position Matrix of the box to draw in the next frame.

Parameter Name	Description
speed	The speed of the box.
width	The width of the drawing canvas.
height	The height of the drawing canvas.

Returned Value: The position Matrix of the box. Equals null if the box can no longer be drawn within the given width/height.