Provide schema file for a functioni...

Provide schema file for a functioning spinning lights redstone build like at casino table, there should be one button that starts the light spining(like a round table where one light after another flashes) and another button which after pressing stops stop the spinning after a random amount of time, and only one light stays on(later I will add like red/black/green) behind each light, but for now provide the working restone for this in the schema, also make sure there is no floating redstone/repeaters/buttons etc, so machine doesn't break after starting it, also please tell me if there is something I need to do for it to work before pressing the start button