person.rb

class Person
  attr_accessor :balance

  def balance_test
    p "Your balance measurement is: #{@balance}"
    case @balance
    when 500...1000
      "You could be a gymnast"
    when 100...500
      "You have normal balance"
    else
      "You either have terrible balance or drank too much"
    end
  end
end

gymnast = Person.new
gymnast.balance = 600
p gymnast.balance_test

drunkard = Person.new
drunkard.balance = 50
p drunkard.balance_test