Sol LeWitt, Wall Drawing #520: Tilted forms with color ink washes superimposed, 1987/2013
Colored ink wash on wall
Three walls, each 148" high, widths variable 
North building of The Bill & Melinda Gates Computer Science Complex & Dell Computer Science Hall 

Drawn by: Michael Abelman, Rachel Houston, Gabriel Hurier, Eileen Lammers, Clint Reams, Jon Shapley, Patrick Sheehy

Lent by The LeWitt Estate
First Installation: Whitney Museum of American Art, New York, April 1987
First Drawn by: Catherine Clarke, Douglas Geiger, David Higginbotham, Anthony Sansotta, Patricia Thornley, and Jo Watanabe 

Collection of The LeWitt Estate
Video by Mark Menjivar