Done

app/application.rb

@@ -0,0 +1,20 @@
+
+
+class Application
+  require 'rack'
+
+  def call(env)
+    return [ 200, {'Content-Type' => 'text/html'}, time_appropriate_greeting]
+    end
+
+  def time_appropriate_greeting
+    time = Time.now
+    if time.hour.to_i >= 12
+      ["<strong>Good Afternoon!</strong>"]
+      else 
+        ["<strong>Good Morning!</strong>"]
+      end
+    end
+  end
+
+#run Application.new