random number generator doesn't seem to save number

Not sure where I'm going wrong here. I've tried researching my problem but have run out of search string ideas for google.(so much so they thought I was a bot) My RNG guessing game seems to generate a new number constantly and not save the number for the current session of the game for the player to guess. I don't know if I'm just trying to make this more difficult that it needs to be.

def initialize
  @@answer = rand(1..100).to_s
end

def answer
  @@answer
end


def guessing
  puts "What's your guess?"
  @@guess = gets.chomp.downcase
  while @@guess != answer
    wrong_answer
  end
  right_answer
end