The Spirit Atomistic Spin Code is an Open Source Spin Dynamics Code developed in large part at the PGI-1 at Forschungszentrum Jülich (FZJ). It simulates the dynamics of magnetic structures and provides optimization tools for studying transitions and energy landscapes. Noteably, this code provides live visualisations and data plots during simulations. This is a descriptive article, details about the code's implementation and links to upload the code can be found on github.