I was walking through Alexanderplatz in the late afternoon, when I saw a group of people drawing on what is normally a panel reserved for advertisement. So I parked my bicycle and talked to them.
It turns out, this was an action by the Kiss the Demon production, which is part of the current Big Draw Berlin festival.
The actions are called “Transform”,
(…) a temporary agency which will playfully create slogans with passers-by and visitors. Together we will turn these messages into illustrated large-scale billboards. Wonderful materials such as tape, paint, hardcore markers, stencils, mega-fonts and cut-n-paste printed matter will be provided
(from the website).
The next action will take place tomorrow between 3 pm and 8 pm at the Atrium of the Deutschen Bank (next to the Guggenheim).