The evolution of the modern man's view of Artificial Intelligence from a rational assistant to a part of the emerging Artificial Life is inevitable. The emerging Artificial Life is a combination of achievements in the fields of Artificial Intelligence and robotics. In both fields, major successes have been outlined, which creates the prerequisites for a qualitative transition from disparate intellectual assistant functions to independent Artificial Life. Thought generation is one of the most important functions of the human brain when thinking. It is necessary to implement the thought generation function in order to create a strong Artificial Intelligence that would be similar in its functioning to the human brain. The purpose of this paper is to show how to simulate thought generation on a computer. Ontologies from the Semantic Web and cellular automaton are the technologies that are used to simulate thought generation on a computer.