On your last page that you wish to redirect you'd need to use the setTimeOut function. So you'd do something like
setTimeout(function(){
window.location.replace("http://url/to/the/first/page/of/your/survey.html");
}, 10000);
Where 10000 is the amount of time it will wait before executing. So if you wanted 15 second wait, then it would be 15000 as this value is in milliseconds.