print("Welcome to the treasure Island.")
print("Your mission is to find the treasure.")
choice1 = input('You are at a crossroad, where do you want to go? Type "left" or "right".').lower()
if choice1 == "left":
     choice2 = input('You\'ve come to a lake. There is an island in the middle of the lake.
 Type "wait" to wait a boat. Type "swim" to swim accross.').lower()
     if choice2 == "wait":
         choice3 = input("You arrive at the island unharmed. There is a house of 3 doors.
 On red, on yellow and one blue. Which color do you choose?").lower()
         if choice3 == "red":
             print("It's a room of full of fire. Game over.")
         elif choice3 == "yellow":
             print("You found the treasure! You win!")
         elif choice3 == "blue":
             print("You enter a room of beasts. Game over.")
         else:
             print("You chose a door that doesn't exist. Game Over.")
     else:
       print("You've attacked by an angry trout. Game over.")
else:
    print("You fell into a hole. Game over.")