canvas example, works only for last graph

[zc] / www / gnuplot

diff --git a/www/gnuplot b/www/gnuplot
new file mode 120000 (symlink)
index 0000000..09b6cb3
--- /dev/null
+++ b/www/gnuplot
@@ -0,0 +1 @@
+/usr/share/gnuplot/gnuplot/5.4/js
\ No newline at end of file