Insert a bar in a graph with curves

I am new to using grafana and would like some advice.

In a graph, I record the temperature of my indoor thermostat, the outdoor temperature and the ON / OFF (0/1) operating state of my heat pump.
I would like to be able to display the state of the heating (0/1) in the form of a transparent bar, which would take the full height of the graph (0/100%), while allowing to continue to see the two temperature curves ?
The abssices axis indicates the passing time.
The y-axis of my graph, indicates the temperatures in for the moment varies from 0 to 22 °
Kind regards,

welcome to the :grafana: forum, @pce5962

are you talking about making a graph like this:

You can change the graph style using field overrides :+1:

Or perhaps this?