LEVEL #1

LEVEL #2
z-index: 1;
LEVEL #3
LEVEL #3
LEVEL #3
LEVEL #3
LEVEL #3
LEVEL #3
LEVEL #3
LEVEL #3
LEVEL #3
LEVEL #3
LEVEL #3

LEVEL #2
z-index: 1;
LEVEL #1
LEVEL #1
LEVEL #1