### in my code
my $foo = $cgi->param('foo');
# do a bunch of things with $foo, 
# get data out of SQLite,
# prepare html output,
print "Content-Type: text/html\n\n", $template->output;

### in my template
<TMPL_LOOP FOO>
  <TMPL_VAR BAR><br>
</TMPL_LOOP>