README.md in state_objects-0.9.0 vs README.md in state_objects-0.9.1

@@ -27,11 +27,11 @@
     $ gem install state_objects
 
 ## Usage
 
     class WalkLights < ActiveRecord::Migration
-      def self.change
+      def change
         create_table :walk_lights do |t|
           t.string :color_state, :default => LightRedState.db_value
         end
     end
     
@@ -56,11 +56,11 @@
       state_objects :color_state,
          LightGreenState,
          LightRedState 
       state_object_events :color_state, :change
                                                                                        
-      scope :red,   where(LightRedState.occurs )    
-      scope :green, where(LightGreenState.occurs )    
+      scope :red,   where(WalkLight.color_state_red_occurs )    
+      scope :green, where(WalkLight.color_state_green_occurs ) 
     end
 
     # now lets use it 
     north_south_elm_300_block = WalkLight.create(color_state: LightRedState.db_value)
     while (true)