Wasted Spaces is a non-profit art organization that transforms vacant properties and other unloved spaces into exciting art experiences. One of their most recent projects is The Hello Wall, in which Wasted Spaces commissioned London-based artist duo Hellicar & Lewis to develop an installation that uses Twitter to let the public interact with the huge wall projection. Users can interact with the wall by tweeting to @thehellowall using words such as shapes (triangles, squares, circles), commands (more, less, shake) or just say hello to @thehellowall.

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