How to do a clickable picture

Here's my Rasta-girl cycling page with clickable pictures.

How to do a clickable pic:

<a href="THE_LINK"><img src="FILENAME_FOR_PICTURE"></a>

if the picture is in your folder; or

<a href="THE_LINK"><img src="LINK_TO_A_PICTURE"></a>

if the picture is on a web site.

Note that in either case, the picture has a picture-type lastname, such as .jpg, .gif, etc.