IF next-is-not-enemy THEN
    turnleft
    WHILE true DO
        IF random THEN
            move
            turnback
            IF next-is-not-wall THEN
                move
            END IF
            infect
            move
        ELSE
            go-for-it
            WHILE next-is-empty DO
            END WHILE
            turnleft
            turnright
        END IF
    END WHILE
    turnright
    skip
    skip-again
END IF