Added two error massages so the user can`t put in a number higher then 3 and lower then 1.
Added a if statement that will reveal one of door that does not have the prize inside.
Added a if statement to display that the first door is open.
Added a chose menu again but now display that the first door is open.
Added a input from the user.
Added three error: Input can`t be lower the 1 or higher then 3 and not 1.
Added a if statement to decide if the user won or lose.
Added the same thing for door two.
Added the same thing for door three.
Added a message if the user lose.
Added a message if the user won.
Added a line to start the program.