diff --git a/play/log.html b/play/log.html
new file mode 100644
index 00000000..cbdb792b
--- /dev/null
+++ b/play/log.html
@@ -0,0 +1,43 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <meta charset="UTF-8">
+    <script>
+      var url = '/log'
+      var xhr, poll;
+      var length = 0;
+
+      function append(chunk) {
+        document.body.innerHTML = document.body.innerHTML + chunk;
+      }
+
+      function handleResponse() {
+        if (xhr.readyState != 4 && xhr.readyState != 3)
+          return;
+        if (xhr.readyState == 3 && xhr.status != 200)
+          return;
+        if (xhr.readyState == 4 && xhr.status != 200) {
+          clearInterval(poll);
+        }
+
+        log = xhr.responseText
+        chunk = log.slice(length)
+        length = log.length
+
+        append(chunk)
+
+        if (xhr.readyState == 4)
+          clearInterval(poll);
+      }
+
+      xhr = new XMLHttpRequest();
+      xhr.open('get', url);
+      xhr.onreadystatechange = handleResponse;
+      xhr.send(null);
+      poll = setInterval(handleResponse, 1);
+    </script>
+  </head>
+  <body></body>
+</html>
+
+
diff --git a/play/log.ru b/play/log.ru
new file mode 100644
index 00000000..275e07c1
--- /dev/null
+++ b/play/log.ru
@@ -0,0 +1,18 @@
+require 'sinatra'
+
+set :server, :thin
+
+get '/' do
+  File.read('play/log.html')
+end
+
+get '/log' do
+  chars = (97..122).to_a
+  stream do |out|
+    1.upto(10000) do
+      out << chars[rand(chars.length)].chr
+      out << ' ' if rand(5) == 1
+      sleep 0.001
+    end
+  end
+end
