diff --git a/ruby-sockets/ping-pong-client.rb b/ruby-sockets/ping-pong-client.rb
new file mode 100644
index 0000000..1cecdb1
--- /dev/null
+++ b/ruby-sockets/ping-pong-client.rb
@@ -0,0 +1,11 @@
+require 'socket'
+
+loop do
+  TCPSocket.open('127.0.0.1', 24000) do |sock|
+    sock.send("PING\n", 0)
+    pong = sock.recv(100)
+    puts "client: RECV PONG"
+    sock.close
+  end
+  sleep 0.5
+end
diff --git a/ruby-sockets/ping-pong-server.rb b/ruby-sockets/ping-pong-server.rb
new file mode 100644
index 0000000..fc33c93
--- /dev/null
+++ b/ruby-sockets/ping-pong-server.rb
@@ -0,0 +1,15 @@
+require 'socket'
+
+server = TCPServer.new('0.0.0.0', 24000)
+loop do
+  Thread.start(server.accept) do |client|
+    if (ping = client.gets) =~ /PING/
+      puts 'server: RECV PING'
+      client.puts("PONG\n")
+    else
+      puts "server: RECV #{ping}"
+      client.puts("NOPE\n")
+    end
+    client.close
+  end
+end