CreativeIceDesigns teaches you how to create an animated banner for MySpace using Adobe Photoshop. After you've finished your static banner in Photoshop, go to Animation. You must be using Frames for this. You can make a new empty frame after the original one and it will make the banner flash. You can also make a new frame and starting from the old one create a movement. You set the speed and the delay. Select both frames and select Tween. In the end you need to go to File - Save for web and devices and choose .gif export.