Described is a system (and method) for automating the process of generating variations of a website that may be continually evaluated to improve a user interaction flow. The process may be based on a genetic algorithm that creates improving generations of websites. For example, the system may automate the creation of different layouts for a website and evaluate the effectiveness of each layout based on a particular user interaction goal. The most effective (e.g., top performing) layouts may be determined and then “bred” as part of an iterative improvement process.