I was experimenting with the halo feature on the materials window to make this picture. I only had the default cube and camera position. I just increased the halo size, and added rings.
I actually made this picture with just one vertex! Again, I increased the halo size, and added lines.
I used the same vertex. I just decreased the halo size and made the star size to 4. That might make a nice "Star of Bethlehem" for a picture someday.
Let me know if any of you want a more "in depth" description of how I made these pictures. I'm not actually quite sure how I made them myself! Hopefully I can make some more interesting stuff soon.