What I can show you are my own Zentangle ATCs, since it was light enough in the house to make pictures before I put them in the mail. ;-)
Waiting for spring to come
Made with micron pigma pen 01 and watercolor pencils.
Kept inside the color
Made with micron pigma black 01, pink 01, green 01 and orange 01 pen.
Hopefully we'll have a Zentangle ATC swap soon again... (hint, hint)