I made a classic Zentangle (T), so a tile of 3 1/2"x 3 1/2", my pencil and fineliner and no eraser.
The result, not bad don't you think?
It's my second one for Diva's Challenge to use her tangle Boo*Kee.
The one on the left is the original.
Reversed colors in Picasa
Softened in Picasa