To have several LEDs blink, fade in and out, and chase would require more than just a simple circuit.
I'm not sure what exactly it is you are looking for, but perhaps you can get away with one of those hiking/biking/walking/camping/emergency flashers much like this one. Usually they are only a couple dollars.
[image]http://www.brightguy.com/images/bgimages/prirf6.jpg[/image]