Device - timer VD Fibaro

[bofisko]

Hi, Can anyoneone help me with a VD in fibaro? I am beginner in LUA.
I made a virtual device in Fibaro HC2 to turn the device on or off - timer. VD works but there is one problem.
I would like to turn off the device and stop the countdown after pressing the button STOP - NULL when the device is started with the button " Run device" . Turnf off device is ok but coundown still counts even after pressing button STOP - NULL. The countdown is running in label " Remaing time"
I would like it to reset and stop the countdown in label "Remaing time".

VD attached in the annex.
Than you.