Track Your Losses Two wins to profit. Dozens

 You bet $10 on the first two dozen.  If you win continue with the same bet.

If you lose you start a new series and track your loss but keep betting $10 on the first two dozen until you win again.

After getting a win following your loss or losses you bet your total losses for the series plus $10.
After losing one and then winning one your loss would be -$20 +$10 =$10 so you add $10 and bet $20 on each of the first two dozen.  
If you lose two in a row then a win you would be -20 -20 +10 =-30 then add 10 so you bet $40 on each of the first two dozen.
If you lose three in a row you would be -20 -20 -20 +10=-50 then add 10 so your bet would be $60 on each of the first two dozen.

If you win you start a new series with $10 on each of the first two dozen.

If you lose you continue in this series and bet of $10 on each of the first two and continue to track your loss for the series.

Say you lose 3 in a row, then win one and then lose again. You would be down the 50 from the three losses and $120 for the loss of 60 on two dozens.  
You would go back to $10 bet until you win.  Then you would bet 50+120-10+10=$170 on each dozen.

So for each series you track your losses and bet your series loss plus $10 after a win.  After you win two in a row you will be up $10 and you start a new series at your next loss.