[Q] NoOS,tried to flashrom through adb but after clicking reboot it still says no rom topic

i tried to root my phone and install roms but then when i flashed the viper rom something went wrong and my phone would only go on recovery (twrp) i panicked... and cleared ALL the data, even my backup and including the os. I looked for guides and saw this one that shows how to install rom through adb, tried it and successfully installed android revolution, but when i try to reboot it says no os installed. please help