Thanks and big shout out to @jmorga106 for his help with the ‘Multiview’ display feature, a great way to make use of the limited real estate. And a equally big shout out to @Mellin, ‘The Professor’ for his parsimonious code:
" Good idea @jmorga106 , but I would do it even simpler.
First, let’s loop seconds into 20 sec periods:
(((#Ds#/20)-(floor(#Ds#/20)))*20)
Then we can use just one condition:
$(((#Ds#/20)-(floor(#Ds#/20)))*20)<=10?100:0$
or after simplifying it with www.wolframalpha.com9 (for less math):
$(#Ds#-(20*(floor(#Ds#/20))))<=10?100:0$
One image, one transparency code! "