Shelly switch behind a z-wave switch

Dear openHAB’ers,

I am in the process of upgrading my openHAB to version 3.0.
OH 2.4 is still running ok so far , but I want to use the Shelly Binding of 3.0.

I face the situation, that some switches are hardwarewise installed behind another switch.

E.g. there is a z-wave switch which powers the whole carport (power outlet and lighting).
As I wanted to make the lighting switchable I added a shelly switch to the lighting.

Of course the shelly can only work, if the z-wave switch is powered on.
So I wonder if I can secure this by a script.

The rule/script should act as follows:
If openhab sends an “ON” command to the shelly device,
then
send an “ON” command to the zwave device,
wait for 0.5 seconds,
send an “ON” command to the shelly device.

As I did not succeed to establish this (probably quite simple script) with blocky yet.

Is there anyone, who could give me a hint?

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