"Are you a cop?"

drawn. pending poster design? a shirt?

X      "DO IT!"

Z           "I DID IT!"
X      "DO IT AGAIN!"

Z           "I DID IT!"

X     "AND AGAIN!"
Z           "I DID IT!"
X     "UNDO IT!"

Z           "I DID IT!"
X     "REDO!"
Z           "NO!"

^^
attibuted to leon golub in a letter to hans-ulrich obrist