  The development of software components for autonomous driving functions
should always include an extensive and rigorous evaluation. Since real-world
testing is expensive and safety-critical -- especially when facing dynamic
racing scenarios at the limit of handling -- a favored approach is
simulation-based testing. In this work, we propose an open-source graphical
user interface, which allows the generation of a multi-vehicle scenario in a
regular or even a race environment. The underlying method and implementation is
elaborated in detail. Furthermore, we showcase the potential use-cases for the
scenario-based validation of a safety assessment module, integrated into an
autonomous driving software stack. Within this scope, we introduce three
illustrative scenarios, each focusing on a different safety-critical aspect.
