Each section of the "Great Wall of Los Angeles" was developed through a process called "Imagining of Content", which was developed at SPARC. The process includes research, inviting experts in various fields relating to the content, and members of the group working collectively to decide important cultural, political, artistic, and historical stories. The process also includes interviewing people who lived through parts of history, if possible. Imagining of Content is designed to help weed out biases. The artists involved with the process would take the information, create thumbnail sketches, and then submit these drawings to critique. The chosen thumbnails were finished in color and then transferred to the wall in large scale. The process from start to finish for each section of the wall took about a year.