I've been working on a project and I am a little bit blocked. 

I've put the next code for saving images on the " Images " folder when s (or S) is pressed:

1. int imageCount;
   
   
   if (keyPressed)

     {

       if (key == 's' || key == 'S')

       {

         imageCount++;

         save("Images/" + "Picture-" + imageCount + ".png");

       }

     }
   
   

It works perfectly fine but I was wondering if it's possible to save the images without overwriting the ones that I saved the last time I ran the sketch. 

For instance, if I run the sketch one time and I save 3 images, they will be named  Picture-1,  Picture-2 and  Picture-3 and will be saved on the Image folder, but if I run the sketch a second time and I want to save, lets say, 2 more images, they will also be named Picture-1 and Picture-2 and will be placed on the same Image folder, which means they will overwrite the first Picture-1 and Picture-2 I saved before... I would like them to be called  Picture -4 and  Picture -5 or to be placed on a new folder named Images-2 or something like that. 

So my question is, is this possible to create a new folder each time I run the sketch with different names? Or is it possible to know how many images there is on my folder in order to do something like this:

1. imageCount = *number of images on the folder*++;