Error when updating for lollipop version

hello!

I am sorry if I am not the first who has the same problem and asking again. I couldn't find any relevant information and decided to post it

So, I got a notification that i need to update my Nexus4, I started to do it, 20% of updating after my phone was power off and then on the screen I saw Android-guy lying on the back and " Error "

What should I do? because i think a new version should be on my device to make it faster and better.

Thank you

Looking forward to hear from you

— modified on Dec 22, 2014, 7:29:40 PM