diff --git a/Gemfile b/Gemfile
index 05a14d1..cb4d5fb 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,6 +1,6 @@
 source 'https://rubygems.org'
 
-ruby '2.3.1'
+ruby '2.5.1'
 
 gem 'rspec'
 gem 'rubocop'
diff --git a/Gemfile.lock b/Gemfile.lock
index 4533f5e..b0df5f6 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -37,5 +37,8 @@ DEPENDENCIES
   rspec
   rubocop
 
+RUBY VERSION
+   ruby 2.5.1p57
+
 BUNDLED WITH
-   1.10.6
+   1.16.6
diff --git a/ball.rb b/ball.rb
new file mode 100644
index 0000000..10f7cc8
--- /dev/null
+++ b/ball.rb
@@ -0,0 +1,42 @@
+require 'yaml'
+
+ANSWERS = YAML.load_file(File.join(__dir__, './answers.yml'))
+
+class String
+  def colorize(color_code)
+    "\e[#{color_code}m#{self}\e[0m"
+  end
+
+  def red
+    colorize(31)
+  end
+
+  def green
+    colorize(32)
+  end
+
+  def yellow
+    colorize(33)
+  end
+
+  def blue
+    colorize(34)
+  end
+end
+
+class Ball
+  def shake
+    shake = rand(ANSWERS.size)
+    case shake
+    when 0..4
+      puts ANSWERS[shake].red
+    when 5..9
+      puts ANSWERS[shake].green
+    when 10..14
+      puts ANSWERS[shake].yellow
+    else puts ANSWERS[shake].blue
+    end
+  end
+end
+
+Ball.new.shake
diff --git a/ball_version_1.rb b/ball_version_1.rb
new file mode 100644
index 0000000..b990d7f
--- /dev/null
+++ b/ball_version_1.rb
@@ -0,0 +1,56 @@
+class String
+  def colorize(color_code)
+    "\e[#{color_code}m#{self}\e[0m"
+  end
+
+  def red
+    colorize(31)
+  end
+
+  def green
+    colorize(32)
+  end
+
+  def yellow
+    colorize(33)
+  end
+
+  def blue
+    colorize(34)
+  end
+end
+
+class Ball
+  def shake
+    red_answers = ["Don't count on it",
+                   'My reply is no',
+                   'My sources say no',
+                   'Outlook not so good',
+                   'Very doubtful']
+
+    green_answers = ['As I see it, yes',
+                     'Most likely',
+                     'Outlook good',
+                     'Signs point to yes']
+
+    yellow_answers = ['Reply hazy, try again',
+                      'Ask again later',
+                      'Better not tell you now',
+                      'Cannot predict now',
+                      'Concentrate and ask again']
+
+    blue_answers = ['It is certain',
+                    'It is decidedly so',
+                    'Without a doubt',
+                    'Yes - definitely',
+                    'You may rely on it']
+
+    shake = [red_answers[rand(red_answers.size)].red,
+             green_answers[rand(green_answers.size)].green,
+             yellow_answers[rand(yellow_answers.size)].yellow,
+             blue_answers[rand(blue_answers.size)].blue]
+
+    puts shake[rand(shake.size)].to_s
+  end
+end
+Ball.new.shake
diff --git a/spec/ball_spec.rb b/spec/ball_spec.rb
index 5083084..120baab 100644
--- a/spec/ball_spec.rb
+++ b/spec/ball_spec.rb
@@ -5,10 +5,10 @@
   let(:answers) { YAML.load_file(File.join(__dir__, '../answers.yml')) }
 
   it { expect(answers).to include(subject.shake) }
-  it { expect(answers).to eql(Ball::ANSWERS) }
+  it { expect(answers).to eql(ANSWERS) }
 
   describe '#shake' do
-    before { stub_const('Ball::ANSWERS', ['ANSWER']) }
+    before { stub_const('ANSWERS', ['ANSWER']) }
 
     it 'prints colorized answer' do
       expect(STDOUT).to receive(:puts).with("\e[31mANSWER\e[0m")
diff --git a/tamagochi.rb b/tamagochi.rb
new file mode 100644
index 0000000..5412cdd
--- /dev/null
+++ b/tamagochi.rb
@@ -0,0 +1,121 @@
+class Pet
+  def initialize(name, age = 0, lifes = 1, mood = 3, hungry = 5,
+                 sleep = 5, death = false)
+    @name = name.capitalize
+    @age = age
+    @lifes = lifes
+    @mood = mood
+    @hungry = hungry
+    @sleep = sleep
+    @death = death
+
+    puts "Pet #{@name} has been created."
+  end
+
+  def eat
+    eat = %w(apple banana meat potato fish honey milk nut)
+    puts "#{@name} has eaten #{eat[rand(eat.size)]}"
+    @hungry += 3
+    @mood += 1
+    plus_one_hour
+  end
+
+  def sleep
+    puts "#{@name} has slept"
+    @sleep += 3
+    @hungry -= 1
+    plus_one_hour
+  end
+
+  def play
+    puts "#{@name} has play"
+    @mood += 3
+    @hungry -= 1
+    plus_one_hour
+  end
+
+  def age
+    puts "#{@name} has #{@age} year old."
+  end
+
+  def mood
+    case @mood
+    when 0..2
+      puts 'Not good'
+    when 3..5
+      puts 'Good'
+    when 6..15
+      puts 'Very very good'
+    end
+  end
+
+  def status
+    puts 'At this moment your pet has next parameters:'
+    puts "Name: #{@name}"
+    puts "Age: #{@age}"
+    puts "Hungry: #{@hungry}"
+    puts "Mood: #{@mood}"
+    puts "Sleep: #{@sleep}"
+    puts "Death: #{@death}"
+  end
+
+  def hungry?
+    puts @hungry <= 3 ? 'Pet wants to eat' : "Pet don't want to eat"
+  end
+
+  def help
+    puts 'Select '
+    puts "	'eat' if you want to feed your pet"
+    puts "	'sleep' if you want to put your pet in bed"
+    puts "	'play' if you want to play with your pet"
+    puts "	'age' if you want to see age of your pet"
+    puts "	'mood' if you want to see mood of your pet"
+    puts "	'hungry?' if you want to see hunger level of your pet"
+    puts "	'status' if you want to see current perameters"
+  end
+
+  private
+
+  def plus_one_hour
+    @hungry -= 1
+    @mood -= 1
+    @sleep -= 1
+
+    death if @hungry < 0
+  end
+
+  def death
+    @lifes -= 1
+    @death = true
+    puts 'Your pet is dead. Sorry :( '
+    exit
+  end
+end
+
+puts 'Type name of your new pet'
+pet = Pet.new(gets.chomp)
+
+loop do
+  command = gets.chomp
+  case command
+  when 'eat'
+    pet.eat
+  when 'sleep'
+    pet.sleep
+  when 'play'
+    pet.play
+  when 'mood'
+    pet.mood
+  when 'age'
+    pet.age
+  when 'hungry?'
+    pet.hungry?
+  when 'status'
+    pet.status
+  when 'help'
+    pet.help
+  when 'exit'
+    exit
+  else puts 'Something wrong.'
+  end
+end