To use ecFlow you need to carry out a few steps.
Firstly you need an ecFlow server running.
Next, you need to write a suite definition that shows how your various tasks run and interact. You also need to write your ecFlow tasks/scripts.
Finally, your suite definition is "loaded" onto an ecFLow server and your suite is started as required and monitored via a GUI
The process is described with the associated ecFlow online course.