if ($my_condition) { print <This code is shown if it's true

My_condition is TRUE

EOF } else { This code is shown if it's false

My_condition is FALSE

EOF ##

##

if ($mycondition) {
  print "Location: url_of_html_file\n\n";
} else {
  print "Location: url_of_another_html_file\n\n";
}