Single-zero roulette, explained without the myths
Thirty-seven pockets, a short list of bets and one fact that every "system" ignores.
Mosaic Roulette uses the European layout: the numbers 1 to 36 in red and black and a single green zero. Every spin is independent. The wheel has no memory, so a run of reds makes the next black no more likely than it was before.
The bets
A straight-up bet on one number pays 35 to 1. Dozens (1–12, 13–24, 25–36) and columns pay 2 to 1. Red or black, odd or even, and the halves 1–18 and 19–36 pay even money. Zero is neither red nor black, odd nor even, so outside bets lose when it comes up.
Why systems do not work
Doubling after a loss, following "hot" numbers or betting against "due" colours all rearrange when you see results, not how often they happen. Every bet on a single-zero wheel returns the same 97.3 per cent of stakes over time, whichever combination you use.
How we draw the result
The winning pocket is chosen by your browser's built-in cryptographic random number source the moment you press spin. The animation that follows shows that result; it never decides it.