// get the focused sequence
seq = getSequence()
if (seq == null) throw "Please open a sequence first"
// get image at index t = 0 and z = 0 respectively
img = seq.getImage(0, 0)
// add the copy to the sequence
seq.addImage(img)
// remove an image at t = 0 and z = 1. Here, the copied image.
seq.removeImage(0, 1);
/*
* Notes:
*
* On a "classic" sequence (with no holes), all those methods are equal:
* img = getImage()
* img = gui.getFocusedImage()
* img = seq.getFirstImage()
* img = seq.getFirstNonNullImage().
* img = seq.getImage(0, 0)
*/
