The aim of this thesis is to implement an application for creating hierarchical nets and their simulation. The nets are composed of components interconnected by oriented edges. Every net has an associated schema which defines the appearance, behavior and way of connection of schema components. The application facilitates definition of new schemas. The simulation consists of discrete steps. During every step the behavioral programs of the activated components that are defined in the schema are processed. Simulation can be recorded and then replayed. The capabilities of the application are demonstrated on the included schemas and networks
