content: {-
   - For this exercise, we are dealing with a type for colours of the rainbow
   - The typeclass is defined here, and note its English spelling.
   - For more information on how this is done, look ahead to:
   - http://learnyouahaskell.com/making-our-own-types-and-typeclasses
   -
   - Have a play with the Colour in ghci, try the succ and pred functions and so on.
   -}
  data Colour = Red | Orange | Yellow | Green | Blue | Indigo | Violet
      deriving (Eq, Ord, Show, Bounded, Enum)   
  
  {-
   - Again, you should be able to write these functions in one line, 
   - using the information from the chapter http://learnyouahaskell.com/types-and-typeclasses
   - and the chapter before
   -}
  
  {-
   - The Colour typeclass is of type Ord
   - What is the "first" (or least) colour
   -}
  firstColour = undefined
  
  -- List the colours in reverse order
  reverseColourOrder = undefined
  
  {-
   - Mix two colours together, to produce the average value of the two.
   - Example: paintMix Orange Green = Yellow
   - If necessary, favour the "higher" value when computing the average.
   - For example: paintMix Green Violet = Indigo
   - Hint: Integer division can be performed with the quot function: quot 7 2 = 3
   -}
  paintMix c1 c2 = undefined
  