sub makeBoxArray {
  my ($x, $y) =  @_;
  return (
   [ ([$x, $y  ]), ([$x+1, $y  ]), ([$x+2, $y  ]), ([$x+3, $y  ]) ],
   [ ([$x, $y+1]), ([$x+1, $y+1]), ([$x+2, $y+1]), ([$x+3, $y+1]) ],
   [ ([$x, $y+2]), ([$x+1, $y+2]), ([$x+2, $y+2]), ([$x+3, $y+2]) ],
   [ ([$x, $y+3]), ([$x+1, $y+3]), ([$x+2, $y+3]), ([$x+3, $y+3]) ],
  );
}

my @A = makeBoxArray( 5, 10 );
# use @A for something
@A = makeBoxArray( 7, 2 );
# use @A for something