This file is the demonstration of the martingale strategy, that used in casinos by players is useless. Script demonstrates, that player's balance increasing linearly, however when the losing streak comes player starts to lose money exponentially.
The martingale is the most common system that players use. The idea is simple, you increase your bets when you lose until you win, then you decrease them back to the starting bet.

P.s. I am personally, found that with truly random roulette streak of same color can reach 30.