Iguana Instruction Language

 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 glass
 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