Universal Transparent Widgets for Scriptable
After downloading both JavaScript files in the repo, move them to your Scriptable folder and first run no-background. Once it has finished running, the backgrounds should be saved and you can now select the Transparent Widgets script in a home screen widget. Make sure that it is set to the 'Run Script' mode. The input parameter determines what the current widget will be saved as (includes size and position).
supermamon - no-background module for scriptable