If the ballot is inconclusive, black smoke rises from the Sistine Chapel.

FORBES: How Is A New Pope Elected?

The public knows when a new pontiff has been selected because white smoke rises from the chimney and the basilica's bells toll.

WSJ: Vatican Begins Countdown to Conclave

If a round of voting comes up short, ballots are burned and black smoke rises from a stovepipe installed at the chapel.

WSJ: Vatican Begins Countdown to Conclave

If the ballot has elected a new Roman Pontiff, white smoke rises.

FORBES: How Is A New Pope Elected?

When a pope is elected, white smoke rises from the stack.

WSJ: Black Smoke Signals No New Pope