In this picture, one large brown circle contains 6 small circles which represent the 6 'Days' of Creation.
Starting from the yellow circle above:

Day 1: Light and Dark.
Day 2: The Firmament.
Day3: Dry Land and Plants.
Day 4: The Sun and The Moon.
Day 5: Fish and Birds.
Day 6: Animals and Adam.
Day 7: The Shabbat that receives from all the other days, and blesses them.

Available as cards and envelopes