I'll pay 0.5 BTC to one who successfully double spends (conditions inside)

I'm offering reward of 0.5 BTC to the first guy who will successfully double spends a transaction under these conditions:First transaction must be visible on blockchain.infoFirst transaction fee per byte (in satoshi) must be greater or same than fastestFee in this API http://bit.ly/2gvkPn7 transaction must spend only already confirmed BTCSecond transaction (the double spend one) must be sent after minimum of 30 seconds after the first oneSecond transaction must get confirmed before the first one//FOR ALL NEW COMERSSecond transaction must be sent to different address than first one via /r/Bitcoin http://bit.ly/2fBPf2S