An animation programming language written by Tom DeFanti in the early 1970s for real-time vector graphics. At the University of Illinois at Chicago it became a tool for artists, and it later led to Zgrass.
GRASS was the original language Tom DeFanti wrote for the mini computer and the Vector General, which was a large interactive vector display for real-time animation in the '70s.
Larry Cuba, Larry Cuba on Choreographing Form