iotacon Street Art

I would like to thank Kelly Gray, who took this photo on the corner of Curtain Road and Holywell Lane in Shoreditch, London. Here is her instagram:
http://instagram.com/p/b7W3dTqX3F/
I would also like to thank Khoi Uong, who saw this photo and told me about it.
But mostly, I would like to thank the anonymous street artist who did this. Amazing.