Conrad Hackett :verified:Can you spot the circles?
It took me a long time. Once you see them, they'll seem obvious.
This is the Coffer Illusion, by Anthony Norcia
GNU social JP is a social network, courtesy of GNU social JP管理人. It runs on GNU social, version 2.0.2-dev, available under the GNU Affero General Public License.
All GNU social JP content and data are available under the Creative Commons Attribution 3.0 license.