README.md in tori-0.0.8 vs README.md in tori-0.0.9

@@ -72,9 +72,51 @@
 photo.image.read #=> image bin
 photo.image.exist? #=> exist check
 photo.image.name #=> filename
 ```
 
+# Attach example
+
+Two image file upload to backend example.
+defined method by `tori` method can define a key name for each by block.
+
+```ruby
+class Photo < ActiveRecord::Base
+  tori :original_image do |model|
+    "#{model.class}/original/#{model.original_filename}"
+  end
+
+  tori :striped_image do |model|
+    "#{model.class}/striped/#{model.striped_filename}"
+  end
+end
+
+class PhotoController < ApplicationController
+  def create
+    original = params[:file]
+    Tempfile.open("striped") { |striped|
+      # image processing example
+      MiniMagick::Tool::Convert.new { |c|
+        c.strip
+        c << original.path
+        c << striped.path
+      }
+
+      # create record
+      photo = Photo.create
+
+      # set image file to model
+      photo.original_image = original
+      photo.striped_image = striped
+
+      # write image file to backend
+      photo.original_image.write
+      photo.striped_image.write
+    }
+  end
+```
+
+
 # Custom configure example
 
 ```ruby
 # Save to S3 bucket.
 require 'tori/backend/s3'