This is from many years ago from gamblers glen
Checked it on live wheel and zumma
1 chip on 0 00
3 chips on 1-6
2 chips on 10-11
2 chips on 13-14
3 chips on 16-21
3 chips on 28-33
I might have the chip amount wrong, i think it was total of 12 chips
But u get the idea
The author claims +1 chip on each loss -1 on a win
I practiced flat bet with success. Up and down but stop playing when up some