Would This be Difficult? (First CI Project)

[eluser]Unknown[/eluser]
I never used CodeIgniger before but there is a feature I would like to add to my website.. I use steps/milestones with clients and I would like them to be timed if possible.. If I set up a certain task for example a design concept of a website.. I would want to have a timer displaying "Design Concept" counting down the seconds next to the task in the same column with notifications at certain times that I or my client can set.. maybe 10 days left.. 5 days.. 1 hour..

its not a huge site/idea but just a small project I can use to teach me a little about CodeIgniter while adding a nice feature to my site.

Would something like this take a while to do?