Some words that have ING in them and can be used to describe the sky are glistening and sparkling. Another word to describe the sky would be dazzling.
towering
soothing
You are such a BOUTEHOOLE
Discouraging
sharing and caring
interesting
Kicking scratching punching
soothing Flaming beautiful
dazzling, smiling, shimmering, glimmering,
Yelling, tackling,
Schooling studying reading