WordPress.org

As with most WordPress plugins, there is two ways of installing this plugin.

Primary Option

1. Go to your WordPress Dashboard and login as an Admin
2. From your Dashboard go to Plugins section on the left hand side and select Add New.
3. Search for Random Image Block
4. Click the Install Now link and follow the instructions.

Secondary Option

1. Download the latest version from the download page (http://wordpress.org/extend/plugins/random-image-block/)
2. Extract the zip file and copy the folder "random-image-block" into the "wp-content/plugins/" directory in your WordPress installation.
3. Activate the plugin from your Dashboard by going to Plugins -> Installed page.