Just HTML5 client, ideally you need to draw:
1) A roulette betting table has number from 0 to 36 with correct color Green Red Black
2) A roulette wheel has number from 0 to 36 with correct color Green Red Black
3) A Spin button that spins the roulette wheel
4) A ball spins at an oposite direction of the wheel
5) Within 2-3 seconds the ball will randomly lands on the number from 0-36
If you done a good job, we'll create more games.