Exercises

Lets do the following exercise:

Implement multiple inheritance but with a prototypal inheritance pattern, not property copying. Here is an example:
```
        var my = objectMulti(obj, another_obj, a_third, { 
        additional: "properties" 
        }); 
```
The additional property should be an own property; all the rest should be mixed into the prototype.
Use the canvas example to practice. Try out different things. Here are some examples:
- Draw a few triangles, squares, and rectangles.
- Add constructors for more shapes, such as Trapezoid, Rhombus, Kite, and Pentagon. If you want to learn more about the canvas tag, create a Circle constructor too. It will need to overwrite the draw() method of the parent.
- Can you think of another way to approach the problem and use another type of inheritance?
- Pick one of the methods that uses uber as a way for a child to access its parent. Add functionality where the parents can keep track of who their children are, perhaps using a property that contains a children array?

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