Spanning a 60-foot wall at GMOA, contemporary artist and composer Tristan Perich’s “Machine Wall Drawing” is an installation that has been slowly creating itself over a six-month period. Though Perich writes the code for a small, custom-built machine to draw the piece, it’s the interaction between the precisely executed code and randomness within the physical world that determines the final outcome. Following the premiere of local filmmaker Russell Oliver’s documentary on Perich’s installation, a Q&A with Perich, held via Skype, will focus on his body of visual artwork and musical compositions as well as his background in math and programming. “Machine Wall Drawing” is on view through Tuesday, Nov. 18.

5:30 p.m. · FREE! · www.georgiamuseum.org