新手初來乍到，請各位大大幫我看看我寫的這個程序里錯誤在哪裡？

            console.log('welcome to your contacts manager');
            var options = ["1: List contacts","0: Quit"];


            console.log(options[0]);
            console.log(options[1]);

            

            function enter_your_option() {
                number = Number(prompt("enter your option! 1 or 0"));
                if(number == 1) {
                    console.log("here is the list of all your contacts:");
                    var Contact = {
                        init: function (lastname,firstname) {
                            this.lastname = lastname;
                            this.firstname = firstname;
                        },

                        describe: function () {
                            var description = "lastName: " + this.lastname + "," + "fristname: "  + this.firstname + ",";
                            return description;
                        }

                    };
                    var contact1 = Object.create(Contact);
                    contact1.init("Smith","john");

                    var contact2 = Object.create(Contact);
                    contact2.init("doe","jane");

                    var contacts = [];
                    contacts.push(contact1);
                    contacts.push(contact2);

                    contacts.forEach(function (contact) {
                        console.log(contact.describe());
                    });

                    enter_your_option();
                }
                else if(number == 0){
                    console.log("end of contact manager!");
                }
            }
            enter_your_option();

如果這些對你有幫助請告訴我，謝謝