Print a Pentomino Rectangle
Bash + common Linux utils, 50

xxd -s20 -p -c2 $0
#&lt;30 bytes of binary data&gt;

To recreate this from encoded base64:
base64 -d &lt;&lt;&lt; eHhkIC1zMjAgLXAgLWMyICQwCiMiImaSaZlmkDAAMwSjRKNEqoGogYhRVVF7UXu7d3s= &gt; pent.sh

Since there are 12 pentominoes, their colours are easily encoded in hex nybbles.
Output:
$ ./pent.sh
2222
6692
6999
6690
3000
3304
a344
a344
aa81
a881
8851
5551
7b51
7bbb
777b
$