To start with, we think about which bits of code we'd like to use more than once. In our case, we might want so code to deal with the fighting. Here's a cut down version of our current code...

    decision = input("You come to a junction. Turn left or right [L,R]: ")

    if decision == "L" or decision == "l":
        print("You turn left and see a terrible ogre!")
        ogre_strength = 2

        while player_strength > 0 and ogre_strength > 0:
            print("You FIGHT!")
            print("SMASH!")
            time.sleep(500)
            print("BASH!")
            time.sleep(500)
            print("Oo!")
            time.sleep(500)
            random_number = random.randint(10)

            if player_strength > random_number:
                print("You won! Gain one strength!")
                player_strength = player_strength + 1
                ogre_strength = ogre_strength - 1
            else:
                print("You lost! Lose one strength!")
                player_strength = player_strength - 1
                ogre_strength = ogre_strength + 1
            if player_strength < 1:
                print("Oh no! You died!")
                sys.exit()



We're going to pull out all the fighting code and put it somewhere separate...