On the background, create a mirror image. You can use anything you want, though it probably works best with a stamped image.
I made this card following Less is More Week 83 Color : Brown & Pink
The pink patterned paper is from Echo Park Everyday Eclectic pack,
cut using Spellbinders Scalloped Square.
The brown birds are cut wit Spellbinders Bird Sanctuary which I love so much
using brown box material from a shoebox which called for recycling.
The birds are placed in mirror image like a kaleidoscope
and the Hello sentiments are stamped on velum
(yet to learn how to flush the velum onto the paper so that it is not obvious).
Overall, it is a CAS card to say Hello, hello, hello, hello...