What’s the opcode sequence for doing the reverse of Multisig?
The following scriptPubKey describes the desired contract:

OP_IF
    OP_DUP OP_HASH160 &lt;Bob's pubKeyHash&gt;
OP_ELSE
    &lt;now+30 days&gt; OP_CHECKLOCKTIMEVERIFY OP_DROP
    OP_DUP OP_HASH160 &lt;Victor's pubKeyHash&gt;
OP_ENDIF
OP_EQUALVERIFY OP_CHECKSIG


Bob can spend the output using the scriptSig &lt;Bob's signature&gt; &lt;Bob's pubKey&gt; OP_TRUE
Victor can spend the output after 30 days using the scriptSig &lt;Victor's signature&gt; &lt;Victor's pubKey&gt; OP_FALSE.