Random circles

Instructions.txt

We going to create random circles inside a circle. (This is called "generative art". If you own a beret now is a good time to put it on.)

We're going to use `map` and a new tool, `flatMap`, in a different context. The idea is to broaden how we think about these tools.

Step 1.
- How could we create a point that is randomly located within a circle? There are many ways to do this. Think of one.
- Use the following methods to create random numbers (you'll need to `import doodle.random._`)
  `Random.double`
  `Random.natural`
  `Random.int`
  
  also `Random[A] map (A => B): Random[B]` and
       `Random[A] flatMap (A => Random[B]): Random[B]`
  to compose functions with `Random` and thus transform them
- Now implement your method to a create point.
- Finally, call the `run` method and you should get a `Point`.

Step 2.
- Given a random point, transform it into a random circle (choose size and color at random)
- Don't use `run`---you're only allowed to call `run` at the very end!
- Draw an `Image` (you're only allowed to call `run` immediately before you call `draw`)

Step 3.
- Create lots of random circles to create a picture of circles arranged in a circle shape.
- Don't use `run`---you're only allowed to call `run` at the very end!