Here is an animated gif and the 3 frames that were used to construct it. Repeat this as many times as you wish. Select 'Animation Wizard' and follow the complete directions you are given. Click on the 'Manage' button and choose 'select all'. Then click on 'Set all existing controls' and then 'apply'.
Check mark the 'transparency' option and click on the 'dropper'.
Move the dropper to your image and click on a background spot. Test your new gif using 'view'.