There is a conveyor belt with $4$ light beams whose function is to measure the size of the fish being caught. The operating conditions are as follows: $$ Small fish only cut one light beam and are rejected and returned to the sea to the right. $$ Large fish that cut $4$ light beams are also returned to the sea, also to the right. $$ Fish that cut $2$ or $3$ light beams are accepted and sent to the left for processing. $$ Only one fish is measured at a time. $$ Impossible situations or those that can be considered errors produce a $0$ for both the left and the right. Make the control circuit for a robot arm that receives a high value for the right and a high value for the left, that is$,$ two outputs called left and right. Consider the $4$ inputs of the light beam sensors that send a high value when they are interrupted.