adding classwork and homework

Hey Jackie - This app works great at the command line.. The one challenge you might find is maintaining it moving forward. If you want to give the user four guesses, you will have to add a lot of code vs just being able to change one number.

A loop might be the perfect tool in your toolkit to pull this off. That loop could be a:
```ruby
3.downto(1) do
  # your code
end
```
or
```ruby 
while guess > 0
   # do code
   guess -= 1
end 
```