Fallthrough case statement in Ruby

fallthrough.rb

value = :initial

catch :redo do
  case value
  when :initial
    puts 'initial'
    value = :changed
    redo
  when :changed
    puts 'changed'
    value = :omgwtfbbq
    redo
  else
    puts 'got here'
  end
end

# >> initial
# >> changed
# >> got here
# => nil