Realizations with Colorix 1: 70 x 56 pixels, 4048 colors: We had the disposal of a "télémécanique" computer of 16k of memory, and a language LISP not managing real numbers... With only integers we were obliged to revise our programming. It was necessary to restart simple elements. We began by programming straight lines, and have been happy to arrive at a filled triangle of pixels. Years 75,76

Realizations with Colorix 2: 384 x 240 pixels, 4048 couleurs : Having purchased a computer LSI 11, with 32k of memory, it became possible to use again the fortran language, real numbers and to abandon straight lines. By choosing a type of particular curves , ("parametrical curves B-Spline") for their convenience and aesthetics, we did not imagine all the developments to come...