neural_network = multi_layered_perceptron do |mlp|
  mlp.add_neuron('i0', :input)
  mlp.add_neuron('i1', :input)
  mlp.add_neuron('h0', :hidden)
  mlp.add_neuron('h1', :hidden)
  mlp.add_neuron('o1', :output)
end

neural_network.train do |nn|
  nn.data('i0' => 0.2, 'i1' => '0.7', 'o1' => '0.8')
  nn.data('i0' => 0.1, 'i1' => '0.2', 'o1' => '0.5')
  nn.data('i0' => 0.3, 'i1' => '0.9', 'o1' => '0.9')
end