164834 Simple one page PHP script

I would like to have a very simple one page PHP script. Two items total. One folder containing numbered graphics One PHP script called [login to view URL] in same folder. the graphics are not really important at this point, but they will all be the same size, I can supply samples if needed. 001 002 003 004 005 006 007 here is how it needs to work, when the url is accessed [login to view URL] The PHP script needs to display that graphic, 001 So when [login to view URL] the PHP script displays the second graphic 002