desperate for help, i know this is wrong place but need help,so tensed ,i tried to install custum rom Cataclysm in nexus 5 , i did it successfully when i was checking all apps, camera was not working. so i thought to re-install lolipop 5.0.1 copying files to my phone became difficult it will come 40-50% and stops or hangs. so i went to recovery (twrp) deleted cache/system/ few other files and then i restarted it says "no OS found" i was shocked and from then i cant get through recovery mode anything. it stuck on the screen where "google" and "screen lock" icon at the bottom is there. please help me out. please let me know any procudure to get back my phone.