Hello Brayan. If you want to pick a number in roulette just choose the last hit number each time. Also the progression you have is way too steep (It would be better for choosing six
numbers at a time instead of one). Try the "breadwinner" progression below.
For one number bet one unit 30 times (30 spins of the wheel). If it doesn't hit, bet two units (on one number) 30 times. If it doesn't hit, bet three units (on one number) 30 times...
If it does hit, stay at the same progression level unit another hit, then decrease betting by one unit. If it misses, continue increasing by one unit (after 30 times).