turn(pro,act,arrivare,25,1,41-67)
turn(pro,act,vedere,25,2,42-68)
turn(pro,dirs,dire,25,2,42-68)

turn(tartaruga, dirs, dire, 25, 2, 42-68).
turn(tartaruga, act, vedere, 25, 2, 42-68).
turn(tartaruga, act, arrivare, 25, 1, 41-67).
