Wordpress countdown timer plugin with cookie

Hi we need a wordpress countdown timer plugin. It need to show a shortcode and/or text when countdown finish Countdown in Minutes and should be used as shortcode(entering the time in the shortcode) also the shortcode or text to display when completed need to be edited from the countdown shortcode. The timer should be on and calculating the time remaining only when the user is on the page/tab with the shortcode. So an example if the timer is set to 5 minutes. After 2 minutes the user go on another page or tab, and only come back 1hour later the timer show the remaining time of 3minutes. It needs to store a cookie so if the visitor refreshes the page or visits the page again the script calculates the difference and starts the timer where it should be as though the visitor never left. right now we use [login to view URL] if you can adjust it to make it work like we want that would be great.