2 A couple of easy golfs
source | link

Retina, 8686 83 bytes

.+
$* --O--¶¶¶¶¶¶____|     |____
{*`$
¶
2D`¶
 ( {5})
$1
}m`^`^ {0,4}-
 $&
 {5}+
--O--
G`_

Try it online!Try it online!

There is probably some sort of compression I could have used on the runway and the empty space over it, but anything I tried came up more expensive than plaintext (in Retina ¶ is a newline, so you can see the initial state in plaintext on the second line).

Retina, 86 bytes

.+
$* --O--¶¶¶¶¶¶____|     |____
{*`$
¶
2D`¶
 ( {5})
$1
}m`^ {0,4}-
 $&
 {5}
--O--
G`_

Try it online!

There is probably some sort of compression I could have used on the runway and the empty space over it, but anything I tried came up more expensive than plaintext (in Retina ¶ is a newline, so you can see the initial state in plaintext on the second line).

Retina, 86 83 bytes

.+
$* --O--¶¶¶¶¶¶____|     |____
{*`$
¶
2D`¶
 ( {5})
$1
}`^ {0,4}-
 $&
 +
--O--
G`_

Try it online!

There is probably some sort of compression I could have used on the runway and the empty space over it, but anything I tried came up more expensive than plaintext (in Retina ¶ is a newline, so you can see the initial state in plaintext on the second line).

1
source | link

Retina, 86 bytes

.+
$* --O--¶¶¶¶¶¶____|     |____
{*`$
¶
2D`¶
 ( {5})
$1
}m`^ {0,4}-
 $&
 {5}
--O--
G`_

Try it online!

There is probably some sort of compression I could have used on the runway and the empty space over it, but anything I tried came up more expensive than plaintext (in Retina ¶ is a newline, so you can see the initial state in plaintext on the second line).