Use the helping focus-square to place a reactor on the floor in front of you. It gives you an initial beat from which you can start creating you composition.
You can place more reactors by side to extend the randomly created beat. Change reactor positions, tempo and other properties.
Mix in beats and tonalizations, to refine your creation. There are more than 100 sound effects for the reactors, and dozens of additional loops to discover.
Note: All music samples and other sound effects are RF (royalty free) and can be found on the internet.
Enjoy...