class Chronic::Season

def self.find_next_season(season, pointer)
  lookup = {:spring => 0, :summer => 1, :autumn => 2, :winter => 3}
  next_season_num = (lookup[season]+1*pointer) % 4
  lookup.invert[next_season_num]
end

def self.season_after(season); find_next_season(season, +1); end

def self.season_before(season); find_next_season(season, -1); end

def initialize(myStart, myEnd)
  @start = myStart
  @end = myEnd
end