that took me far too long to get
(
Marxist Pig Better Red Than Smeg,
Thu 11 Feb 2016, 22:15,
archived)
...and your reply inspried me to think about it again
got it now :)
(
PedroHin Come along & ride on a Flantastic Voyage,
Thu 11 Feb 2016, 22:16,
archived)