{source}<!-- You can place html anywhere within the source tags -->
<iframe src="https://www.google.com/maps/embed?pb=!1m14!1m8!1m3!1d17863.1926166266!2d21.430536224898272!3d37.67749729824066!3m2!1i1024!2i768!4f13.1!3m3!1m2!1s0x1360bfa729dee84d%3A0x29bce00be9e993eb!2zzpXPgc-FzrjPgc6_z40gzqPPhM6xz43Pgc6_z4UgNiwgzqDPjc-BzrPOv8-CIDI3MSAwMA!5e0!3m2!1sel!2sgr!4v1562924438898!5m2!1sel!2sgr" width="100%" height="300" frameborder="0" style="border:0" allowfullscreen></iframe>

<script language="javascript" type="text/javascript">
// You can place JavaScript like this

</script>
<?php
// You can place PHP like this

?>{/source}