Assignment 6: Favorite Animal

    var Penguin = function (name) { //Penguin ctor
      this.name = name;
      this.awake = true;
      this.asleep = false;
    }

    // ----- setters -----

    Penguin.prototype.setName = function setName(name) {
      if (typeof name === 'string'){
        var oldName = this.name;
        this.name = name;
        console.log("You changed " + oldName + "'s name to " + name + ". I liked it better before.")
      }
      else
        console.log("Please enter a string for your penguin's name.")
    }
    Penguin.prototype.setAge = function setAge(age){
      this.age = age;
      console.log("You changed " + this.name + "'s age to " + age + ".");
    }
    Penguin.prototype.setColor = function setColor(color){
      this.color = color;
      console.log("You changed " + this.name + "'s color to " + color + ".");
    }
    Penguin.prototype.setSex = function setSex(sex){
      sex = sex.toLowerCase();
      if (sex === "male" || sex === "female"){
        this.sex = sex;
        console.log("You changed " + this.name + "'s sex to " + sex + ".");
      }
      else
        console.log("Sorry, " + "'" + sex + "'" + " is not a valid answer. Please answer with male or female.");
    }
    Penguin.prototype.setHeight = function setHeight(height){
      this.height = height;
      console.log("You changed " + this.name + "'s height to " + height + " inches.");
    }
    Penguin.prototype.setWeight = function setWeight(weight){
      this.weight = weight;
      console.log("You changed " + this.name + "'s weight to " + weight + " lbs.");
    }

    // ----- getters -----

    Penguin.prototype.getName = function getName(){
      return this.name;
    }
    Penguin.prototype.getAge = function getAge(){
      if (this.age)
        return this.age;
      else
        console.log("You haven't set " + this.name + "'s age yet. (Hint: Use a setter)");
    }
    Penguin.prototype.getColor = function getColor(){
      if (this.color)
        return this.color;
      else
        console.log("You haven't set " + this.name + "'s color yet. (Hint: Use a setter)");
    }
    Penguin.prototype.getSex = function getSex(){
      if (this.sex)
        return this.sex;
      else
        console.log("You haven't set " + this.name + "'s sex yet. (Hint: Use a setter)");
    }
    Penguin.prototype.getHeight = function getHeight(){
      if (this.height)
        return this.height;
      else
        console.log("You haven't set " + this.name + "'s height yet. (Hint: Use a setter)");
    }
    Penguin.prototype.getWeight = function getWeight(){
      if (this.weight)
        return this.weight;
      else
        console.log("You haven't set " + this.name + "'s weight yet. (Hint: Use a setter)");
    }

    // ----- methods -----

    Penguin.prototype.swim = function swim() {
      console.log(this.name + " loves the water.");
    }
    Penguin.prototype.eat = function eat() {
      console.log(this.name + " ate a fish! Great for " + this.name + ", not so great for the fish.");
    }
    Penguin.prototype.walk = function walk() {
      console.log("Walking is something that " + this.name + " does a lot.");
    }
    Penguin.prototype.slap = function slap() {
      console.log("That was one hell of a slap, " + this.name + "!");
    }
    Penguin.prototype.sleep = function sleep() {
      if (this.awake === true){
        this.awake = false;
        this.asleep = true;
        console.log(this.name + " fell asleep. Sweet dreams.");
      }
      else
        console.log(this.name + " is already asleep.");
    }
    Penguin.prototype.wake = function wake() {
      if (this.awake === false){
        this.awake = true;
        this.asleep = false;
        console.log("Good morning, " + this.name + ".");
      }
      else
        console.log(this.name + " is already awake.");
    }

    var penguin1 = new Penguin("Louie");
    var penguin2 = new Penguin("Sally");

    penguin1.sleep();
    penguin1.wake();
    penguin2.slap();
    penguin2.setAge(4);
    penguin2.getAge();
    penguin1.setSex("Male");
    penguin2.setSex("Female");
    penguin2.swim();
  

Jump into the console to see the results. Also, try using some of the methods that I didn't include.
Also, thank you to Google for providing Prettify. I hated the black and white code.