diff --git a/libs/random/example/array.cpp b/libs/random/example/array.cpp
new file mode 100644
index 00000000..fab28b54
--- /dev/null
+++ b/libs/random/example/array.cpp
@@ -0,0 +1,36 @@
+//
+// Sprout C++ Library
+//
+// Copyright (c) 2013
+// bolero-MURAKAMI : http://d.hatena.ne.jp/boleros/
+// osyo-manga : http://d.hatena.ne.jp/osyo-manga/
+// 
+// Readme:
+// https://github.com/bolero-MURAKAMI/Sprout/blob/master/README
+//
+// License:
+// Boost Software License - Version 1.0
+// <http://www.boost.org/LICENSE_1_0.txt>
+//
+#include <sprout/random.hpp>
+#include <sprout/array.hpp>
+#include <sprout/algorithm.hpp>
+
+int
+main(){
+	static constexpr sprout::default_random_engine engine;
+	static constexpr sprout::uniform_smallint<int> dist(1, 6);
+
+	static constexpr sprout::array<int, 10> result = sprout::generate(
+		// Result type
+		sprout::array<int, 10>{},
+		// Random generator
+		sprout::random::combine(engine, dist)
+	);
+	
+	static_assert(
+		result == sprout::make_array<int>(1, 1, 5, 2, 4, 2, 6, 2, 5, 1),
+	"");
+
+	return 0;
+}
diff --git a/libs/random/example/distribution.cpp b/libs/random/example/distribution.cpp
new file mode 100644
index 00000000..b78b098f
--- /dev/null
+++ b/libs/random/example/distribution.cpp
@@ -0,0 +1,60 @@
+//
+// Sprout C++ Library
+//
+// Copyright (c) 2013
+// bolero-MURAKAMI : http://d.hatena.ne.jp/boleros/
+// osyo-manga : http://d.hatena.ne.jp/osyo-manga/
+// 
+// Readme:
+// https://github.com/bolero-MURAKAMI/Sprout/blob/master/README
+//
+// License:
+// Boost Software License - Version 1.0
+// <http://www.boost.org/LICENSE_1_0.txt>
+//
+#include <sprout/random.hpp>
+#include <iostream>
+
+int
+main(){
+	//
+	// Random engine
+	//
+	static constexpr sprout::default_random_engine engine;
+
+	// 
+	// Distribution
+	//
+	// 1 ~ 6
+	{
+		static constexpr sprout::uniform_int_distribution<> dist(1, 6);
+		static_assert(dist(engine)       == 1, "");
+		static_assert(dist(engine)()     == 1, "");
+		static_assert(dist(engine)()()   == 5, "");
+		static_assert(dist(engine)()()() == 3, "");
+	}
+
+	// 0.0 ~ 1.0
+	{
+		static constexpr sprout::uniform_real_distribution<double> dist(0.0, 1.0);
+// 		static_assert(dist(engine) == 0.7.8259e-006, "");
+// 		static_assert(dist(engine) == 0.131538, "");
+// 		static_assert(dist(engine) == 0.755605, "");
+// 		static_assert(dist(engine) == 0.45865, "");
+		std::cout << dist(engine) << std::endl;
+		std::cout << dist(engine)() << std::endl;
+		std::cout << dist(engine)()() << std::endl;
+		std::cout << dist(engine)()()() << std::endl;
+	}
+
+	// Returns true with probability 50%
+	{
+		static constexpr sprout::bernoulli_distribution<> dist(0.5);
+		static_assert(dist(engine)       == 1, "");
+		static_assert(dist(engine)()     == 1, "");
+		static_assert(dist(engine)()()   == 0, "");
+		static_assert(dist(engine)()()() == 1, "");
+	}
+
+	return 0;
+}
diff --git a/libs/random/example/random.cpp b/libs/random/example/random.cpp
new file mode 100644
index 00000000..1709cb75
--- /dev/null
+++ b/libs/random/example/random.cpp
@@ -0,0 +1,53 @@
+//
+// Sprout C++ Library
+//
+// Copyright (c) 2013
+// bolero-MURAKAMI : http://d.hatena.ne.jp/boleros/
+// osyo-manga : http://d.hatena.ne.jp/osyo-manga/
+// 
+// Readme:
+// https://github.com/bolero-MURAKAMI/Sprout/blob/master/README
+//
+// License:
+// Boost Software License - Version 1.0
+// <http://www.boost.org/LICENSE_1_0.txt>
+//
+#include <sprout/random.hpp>
+
+//
+// Compile Time Random
+//
+int
+main(){
+	//
+	// Random engine
+	//
+	static constexpr sprout::hellekalek1995 engine;
+	static_assert(engine()   == 2110608584, "");
+	static_assert(engine()() == 239248507, "");
+
+	// 
+	// Distribution
+	//
+	static constexpr sprout::uniform_int_distribution<int> dist(100, 999);
+	
+	//
+	// Get random value
+	//
+	// return int value
+	static constexpr int n = *dist(engine);
+	// or
+	// operator int
+// 	static constexpr int n = dist(engine);
+	static_assert(n == 984, "");
+	
+	//
+	// Next random value
+	//
+	static_assert(dist(engine)()       == 200, "");
+	static_assert(dist(engine)()()     == 566, "");
+	static_assert(dist(engine)()()()   == 255, "");
+	static_assert(dist(engine)()()()() == 175, "");
+
+	return 0;
+}
diff --git a/libs/random/example/seed.cpp b/libs/random/example/seed.cpp
new file mode 100644
index 00000000..41535b7a
--- /dev/null
+++ b/libs/random/example/seed.cpp
@@ -0,0 +1,57 @@
+//
+// Sprout C++ Library
+//
+// Copyright (c) 2013
+// bolero-MURAKAMI : http://d.hatena.ne.jp/boleros/
+// osyo-manga : http://d.hatena.ne.jp/osyo-manga/
+// 
+// Readme:
+// https://github.com/bolero-MURAKAMI/Sprout/blob/master/README
+//
+// License:
+// Boost Software License - Version 1.0
+// <http://www.boost.org/LICENSE_1_0.txt>
+//
+#include <sprout/random.hpp>
+#include <iostream>
+// #include <boost/mpl/print.hpp>
+
+int
+main(){
+	static constexpr sprout::uniform_int_distribution<int> dist(100, 999);
+
+	{
+		static constexpr auto seed = 2013;
+		static constexpr sprout::default_random_engine engine(seed);
+
+		static_assert(engine() == 33832491, "");
+		static_assert(dist(engine) == 114, "");
+	}
+
+	{
+		static constexpr auto seed = 8379842;
+		static constexpr sprout::default_random_engine engine(seed);
+
+		static_assert(engine() == 1253567439, "");
+		static_assert(dist(engine) == 625, "");
+	}
+
+	//
+	// Compile time unique seed
+	//
+	{
+		static constexpr auto seed = SPROUT_UNIQUE_SEED;
+		std::cout << seed << std::endl;
+
+		static constexpr sprout::default_random_engine engine(seed);
+		std::cout << engine() << std::endl;
+		std::cout << dist(engine) << std::endl;
+
+		// compile time output
+// 		typedef boost::mpl::print<boost::mpl::int_<seed>>::type unique_seed_type;
+// 		typedef boost::mpl::print<boost::mpl::int_<engine()>>::type engine_type;
+// 		typedef boost::mpl::print<boost::mpl::int_<dist(engine)>>::type dist_type;
+	}
+
+	return 0;
+}