Phone won't boot up.

[VizualProphet]

Hey guys I really need some help. I tried to update my phone using Wugfresh's Nexus Toolkit but after doing the Flash Stock + Unroot my phone is now stuck on the Google screen. I tried going in to factory reset when in recovery but it says I have no OS installed. How can I fix this?

 

[renegad3]

dont use toolkits, learn how to flash factory images...

https://developers.google.com/android/nexus/images