The object for the lower half of the robot. Every object in the game is held in a block of 20 bytes: byte 00 is the number of the sprite (zero if the slot is unused), 01 to 03 are the x, y and z coordinates, 04 to 06 the width, depth and height, 07 the flags, 09 to 0B the speeds along each axis, 0C and 0D more flags, 10 and 11 are for use by the update routine of the object, 12 and 13 are the pixel offsets of the sprite and 18 to 1B are the size and position of the sprite on the screen.