I have the following code:

```
        function Vector(X,Y) //Constructor
        {
            this.X = X;
            this.Y = Y;
        }

        function Box(Size /*Vector*/, Position /*Vector*/) //Constructor
        {
            this.Size = Size;
            this.Position = Position;
            this.Velocity = new Vector(0,0);
            this.Anchored = true;
            this.CanCollide = false;
            this.Colour = "rgb(50,50,50)";

            this.draw = function()
            {
                ctx.fillStyle = this.Colour;
                ctx.fillRect(this.Position.X-(this.Size.X*0.5),this.Position.Y-(this.Size.Y*0.5),this.Size.X,this.Size.Y);
            }
        }

        function Player(Size,Position)
        {
            Box(Size,Position);
            this.Anchored = false;
            this.CanCollide = true;
            this.Colour = "rgb(0,100,0)";
        }

        var Me = new Player(new Vector(25,25), new Vector(10,10));
        console.log(Me.Velocity);

```

If you look at the first statement in the constructor function, 'Player', you'll see that I called the function Box; I'm trying to inherit the properties and methods of 'Box' into 'Player'. I don't get any errors, however when I try and reference an inherited property, (the last statement), it returns undefined.

Why doesn't Player inherit Box's properties? I understand that JS is prototype based, and that this is extremely unorthodox, but I cannot make any sense as to how to inherit through multiple objects using prototypes.