I messed up

So, I am selling my OnePlus One. I unlocked bootloader and custom recovery and ROMed it. I went to go wipe it, and I accidentally deleted everything. I can get to boot loader menu and to the recovery menu. However my phone doesn't show up on my computer. What do??
P.s. I'm a noob when it comes to all this stuff.
P.p.s. I'm sorry all to those I havent been around in a while. Been very busy

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