initial commit

utils/scene.rb

@@ -0,0 +1,19 @@
+class Scene
+  # Base class for all scenes.
+
+  def initialize
+  end
+
+  def update
+  end
+
+  def draw
+  end
+
+  def button_down(id, pos)
+  end
+
+  def close
+    $bus.unlisten_owner(self)
+  end
+end