Default [Q] Wipe Opera System

I have root my Kindle HDX 7" and install Safestrap. Then, I wiped all data (including opera system) in stock ROM. Now, I get my Kindle HDX with bootloader, stock recovery but no opera system. When I press the power button, the Kindle show only the grey "Kindle Fire" on black background. I don't know if I can recover my Kindle. Please help!