The object for the lower half of the robot. Every object in the game is held in a block of 32 bytes: byte 0 is the number of the sprite (zero if the slot is unused), 1 to 3 are the x, y and z coordinates, 4 to 6 the width, depth and height, 7 the flags, 9 to 11 the speeds along each axis, 12 and 13 more flags, 16 and 17 are for use by the update routine of the object, 18 and 19 are the pixel offsets of the sprite and 24 to 27 are the size and position of the sprite on the screen.