(Temporary) Tattoo

tattoo

[ta-too]
noun, plural tat·toos.

1.  the act or practice of marking the skin with indelible patterns, pictures, legends, etc., by making punctures in it and inserting pigments.
2.  a pattern, picture, legend, etc., so made.

The amazing ephemeral, reflective patterns created on the skin of nearby Millennium Tower by the morning sunlight.