Rotation of an object

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Hello !...

I'm starting to work on the clock !... (What a challenge !... )

I already manage to do many great things... But I have a problem with the rotation of the hands.

I want the students to be able to rotate the hands clockwise and anti-clockwise.

So I made a "+" button to rotate the minute hand clockwise. I use the cpt effect "rotate 6°" for each minute. And it works fine.

I also made à "-" button to rotate the same hand anti-clockwise (using also the cpt effect "rotate -6°"), and when I did so, the hand returns to its original (vertical) position before the rotation !...

So for example, if I rotate the minute hand to 20 using the "+" button, and then I want the hand to be on the 19, if I click on the "-" button, the hand returns to its original position before rotating... And this is not what I want !...

Don't know If I'm crystal clear !... ...

I will make some screenshots !...

And I clik on the "-" button one time this happens :

So the minute hand returns to its original position before rotating, and I want to avoid that !...

Is this possible ??...

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I also made a button to reinitialize everything (Remise à zéro) but I don't know how to make the hands returning to their initial positions (vertical)...

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And as I'm here another question :

I found the cpt variables for the hour and the minute... but not for the second !... Is it possible to get it ?...

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Thanks in advance for your help !...

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