How to Change the Icon on the Sign-In Page in SharePoint 2010?

You’ve turned on claims-based authentication for a web application in SharePoint 2010, and you’ve also enabled the “Forms-based authentication” option in the authentication settings for one or more zones. The sign-in page SharePoint displays when you browse to the site has an error icon (red circle with a white X) on it, and you’d like to replace that with a different icon