BEFLIX is the name of the first embedded domain-specific language for computer animation, invented by Ken Knowlton at Bell Labs in 1963.
He also collaborated with the artist Stan Vanderbeek at Bell Labs to create a series of computer-animated films called Poemfields between 1966 and 1969.
A later version targeting FORTRAN IV resembled a more traditional subroutine library and lost some of the unique flavor to the language.
Pixels are produced by writing characters to the screen of the microfilm recorder with a defocused electron beam.
BEFLIX also supports a preview mode where selected frames of the output are written to the line printer.
Low-level statements in BEFLIX apply operations to a scanner based on a set of conditions being met.