foreach my $key (keys %other_hash)
    {
#    foreach (@{$other_hash{$key}}
#        {
        for (my $i=0; $i<=@{$points_by_name{$key}}-4; $i+=2)
            {
            innerloop( @{$other_hash{$key}}[$i..$i+3] );
            }
#        }
    }