my $g = Games::Grid->new(
  border => 4,
  width => sub { $_[0]/4 },
  height => sub { $_[0] },
  fill => '=',
);

{
  my $W = $self->{terminal}->{_co};
  my $H = $self->{terminal}->{_li};

  $self->terminal->{WIDTH}  = $config{width}->($W);
  $self->terminal->{HEIGHT} = $config{height}->($H);

}