Teachpack : Mastermind

# Mastermind

### master.ss

The teachpack `master.ss` provides the single operation `master`, which implements a simple GUI selecting two colors, evaluating the two guesses, and displaying an answer. The operation consumes the function `check-guess` and then plays TeachMasterMind. The function `check-guess` is responsible for comparing the color guesses of a player with the (random) choices of `master.`

The teachpack provides only one operation:

- `master : check-guess -> symbol;`
  It prompts users for two colors (symbols) and uses `check-guess` to play mastermind.
  If the guesses completely match the set-up, `check-guess` must return `'PerfectGuess`; otherwise it must return a different, informative symbol.
- Legitimate colors are: black white blue red green gold pink brown purple navy