Ergo sum, if we leave the area of Region1(Snow) we will fade the color from white(Snow) to grey(Rock), so we have to check if the height is low enough and how much % of snow is still visible.
(we; leave; the area of Region1) (how much % of snow; is; T:still; visible) (we; will fade; the color; T:Ergo sum) (we; to check; if the height is low enough and how much % of snow is still visible) Context(we to check,List([106, 122))):(the height; is; low enough)
we to check,List([106, 122))
we how much % of snow we we the height
leave is will fade to check is
the area of Region1
T:still visible
the color T:Ergo sum
if the height is low enough and how much % of snow is still visible
low enough