To create a Mitosheet, open a new or existing JupyterLab notebook. The common command to start JupyterLab is python -m jupyter lab. If you don't know how to create a JupyterLab notebook, you can watch this 8 second video.
Once you've created a notebook, copy and paste the code below into a Jupyter code cell.
Then run the Mitosheet generating code by clicking on the code cell that contains it and pressing Shift + Enter.
If a Mitosheet does not appear, make sure that you followed the Installation Instructions. If you ran the installer already, make sure to refresh your JupyterLab server.