open (INTERVAL, "/Users/logancurtis-whitchurch/Dropbox/thesis_folder/galaxy_chrX_data/chrX_1Mbwindow_nonoverlapping.interval") or die "can't open file\n";

while (my $interval = <INTERVAL>){ 
		
		chomp($interval);
		my @find_interval = split(/\t/, $interval);
		my $start = $find_interval[1];
		my $end = $find_interval[2];