loops ; switch on/off masks ; export png

[aka]

Hi,

Can someone please help me for my first gimp script ?

I have a gimp file with these layers : a, b1, b2, c, d1, d2 and e.

I would like to do a script which exports several images from this gimp file. I need this script does a selection of the layers for each export, I wish in fact this :

image1.png : only with layers a, b1, c, d1 and e. (layers b2 and d2 are hidden)
image2.png : only with layers a, b1, c, d2 and e. (layers b2 and d1 are hidden)
image3.png : only with layers a, b2, c, d1 and e. (layers b1 and d2 are hidden)
image4.png : only with layers a, b2, c, d2 and e. (layers b1 and d1 are hidden)


So can someone explain me :

1. How to do loops,
2. How to switch on/off layers,
3. How to export ?

Thanks