You can realize these fractals by the program Fractint, if you
copy this file L-system codes for Fractint (The 77 Generated Graphics)
into the directory of Fractint and look at for different L-system
fractals.(You select the fractal typ "lsystem", after
it use the key F6). The freeware (!) Fractint is available in
the internet http://spanky.triumf.ca/www/fractint/fractint.html