title: count total clicks made by user on entire site and change background accordingly
body: <p>how would I go about tracking the number of click a user make on a site, and change the background accordingly, so for example: when a user lands of the first page the background is a small object, then as the user explores the site, the background changes, according to how many links have been clicked through, this would then cycle round.</p>
  
  <p>these are the ideas i have come up with:</p>
  
  <p>track the incoming source on each page, and if source was from this site, then add 1 to a counter stored in cookie, retrieve cookie and display corresponding background.</p>
  
  <p>or to cause click on link to add one to counter in cookie.</p>
  
  <p>any other suggestions or ideas? or is this bad practice or a very bad idea?</p>
  
  <p>ps re research i tried and failed to find anything useful</p>