Rather than pay $20 I looked on Google and found the system posted here in 2013

Myra One: A Line Number Repeter System

Track the last 12 numbers, separate into natural lines.

From the 13th spin forward, bet all of the numbers that
have hit in the last decision's line once.  Repeat for each new spin.

Example: 12,0,19,3,21,35,4,15,31,29,2,33 (newest spin-value)

Line 1-6:      2,3,4
Line 7-12:   12
Line 13-18: 15
Line 19-24: 19,21
Line 25-30: 29
Line 31-36: 31,33,35
0: 0

Since the last decision's line is 31-36 bet the
numbers that have already hit in that line once: 31,33,35

Newest spin-value: #1 (trigger)

Bet the newest spin-value and numbers
that have already hit in L1-6 once: 1,2,3,4

And on and on.  Stop on a win or a
drawdown of -36 units per one unit base bet.

Bankroll suggestion: 300 units per one unit
base bet.  Six-hundred units per two unit base bet.

Win-Target/Stop-Loss: +10%/-50% of the original bankrol amount.