Author:
Volker Bäcker
Example

Open and show all images
selected by the user.
Description
The user sets up a list of image filenames. "foreach image do" and
"foreach image end" build a loop. In each cycle the result of "foreach
image do" is the current filename. When "foreach image end" is reached
the current filename is set to the next in the list and the execution
continues after "foreach image do". When the last filename in the list
is reached execution continues after "foreach image end".