a.js

function Animal(name, numLegs) {
    this.name = name;
    this.numLegs = numLegs;
};

Animal.prototype.sayName = function() {
    console.log('Hi my name is ' + this.name);
};

var penguin = new Animal("Captain Cook", 2);
penguin.sayName();

var penguin = new Animal("Captain Cook", 2);
penguin.sayName();


/*

Create a class named Animal with two properties, name and numLegs. 
The Animal constructor should have two arguments whose values are assigned to name and numLegs.

Next, change the prototype of Animal and add a method sayName that prints to the console 
"Hi my name is [name]", where [name] is the value of name.

Click "Stuck? Get a hint!" for examples of how to create a class and how to add a method to an object's prototype.

Finally, we have provided the last two lines to test your constructor and sayName method. Don't change these!

*/