The above is an image of a european roulette wheel diagram. You can see the layout and order of the roulette numbers and the alternating red and black sequence around the wheel. For more information and additional roulette wheel diagrams visit Roulette Wheel Diagrams at I Love Roulette.
The American roulette wheel diagram differs both in order and it also has additional 0 the double zero (00) making the total numbers 38.
If you want to play roulette there are many online roulette casinos that can offer various type of games. Play online roulette for free before you commit to playing for real money. This way you can get a good feel of the roulette wheel and the roulette table layout.