laser etching a spiral design on a glass

This project was sort of a goof that worked out OK.
A logo was etched on a glass, and then by mistake that same glass was picked up to try a spiral design - in this case, a music staff with notes. 

Step 1:

I recently took the laser rotary class at the TechShop http://www.techshop.ws. One example they had in the room was a spiral design from the epilog laser site which has free downloads available http://www.epiloglaser.com. Had to try it out.