GENESIS Chapter 1:6-8
6 And God said, Let there be a firmament in the midst of the waters, and let it divide the waters from the waters.
7 And God made the firmament, and divided the waters which were under the firmament from the waters which were above the firmament: and it was so.
8 And God called the firmament Heaven. And the evening and the morning were the second day.
The reason why the sky is blue is because there is waters above our heads same color as the ocean. The flat Earth waters will show difference than the waters over our heads which is on terrible crystal. Ezekiel 1:22
