Iguana Instruction Language (IIL) Version 1.0

   Opcode	Operation

   0 0 0 0	sleep
   0 0 0 1	reserved for backward compatibility
   0 0 1 0	reserved for backward compatibility
   0 0 1 1	rotate head side-to-side
   0 1 0 0	eat
   0 1 0 1	turn around
   0 1 1 0	crap
   0 1 1 1	run away
   1 0 0 0	climb up
   1 0 0 1	close right eye
   1 0 1 0	scratch window
   1 0 1 1	lick
   1 1 0 0	close left eye
   1 1 0 1	move non load-bearing arm
   1 1 1 0	reserved for future use
   1 1 1 1	bounce head up and down