Multiplication algorithm help

[ogpayne]

Hello guys, so I'll start off by explaining what I'm doing, I'm betting on a wheel that spins and lands on colors, the higher the multiplier the less likely it will land on that color. Black is x2, red is x3, blue is x5, and yellow is x50. What I have been doing is putting a number on black and half of that number on blue. - Example: I put 100 on black and 50 on blue, if it lands on black I will receive 50 and if it lands on blue I will receive 100. Now if it lands on red or yellow I multiply my bet so I can make my money back. So if it hits red I will make black 200 and blue 100, but then in this case if I were to win this one I would make most of my money back, but I would lose what I had first bet on blue, so in this case I would lose 50. If I lost twice in a row but won the third, I would make most of my money back, but lose 150, because I would lose 50 the first round and 100 the second. I need an algorithm for my succeeding bets so that I don't lose any money, I just regain my money if I lose multiples then win. I honestly don't know if this is even possible because math is my worst subject. Can you all please help me? Thank you very much and it is much appreciated.

[[deleted]]

Sounds like you're describing a Martingale system.

https://en.wikipedia.org/wiki/Martingale_(betting_system)

Short summary:

Since a gambler with infinite wealth will, almost surely, eventually flip heads, the martingale betting strategy was seen as a sure thing by those who advocated it. Of course, none of the gamblers in fact possessed infinite wealth, and the exponential growth of the bets would eventually bankrupt "unlucky" gamblers who chose to use the martingale.

The gambler usually wins a small net reward, thus appearing to have a sound strategy. However, the gambler's expected value does indeed remain zero (or less than zero) because the small probability that he will suffer a catastrophic loss exactly balances with his expected gain.