closures-1.rb

def returning(value, &block)
  yield
  value
end

def counter(start, inc)
  lambda do
    returning start do
      start += inc
    end
  end
end

result = counter(10, 2)

puts result.call
puts result.call
puts result.call
puts result.call

result = counter(2, 3)

puts result.call
puts result.call
puts result.call
puts result.call