Tragedy of Seven

tsuchiya3

This is a mathematical pattern including computer improvisation by random number. The computer program indicates only the rough process of the painting: in this case, to plot 50 closed curves which grow mainly in seven directions. Under this condition, the computer calls a random number and increases or decreases the radius of the closed curves by the value of the random number repeatedly. An IBM 7090 computer and CalComp 563 plotter were used.

[Source: Computers and Automation '68]