my $circle = Circle->new(4.5, 2.3, 2.2, 1)

##</code><code>##

my $circle = Circle->new();
$circle->set_radius(4.5);
$circle->set_origin(2.3, 2.2);
$circle->set_visibility(1);

##</code><code>##

my $circle = Circle->new(
    radius     => 4.5,
    origin     => [2.3, 2.2],
    visibility => 1,
);