How could I produce/rig this flame-colour lottery? Not sure if this is the wrong SE for this, happy to move it if not...

In the Netflix TV series Sabrina, there is a scene where people take part in an appropriately-gothic-and-ominous lottery, which proceeds as follows:


Fourteen participants draw, one at a time, pieces of paper from a box.  The papers are all blank and have no differences visible to the human eye in the (rather moody) lighting.
The participants burn their paper in the flame of a candle which is in front of them.  There is a separate candle for each participant, but they all appear to burn with the same yellow flame.
Twelve of the papers burn up quickly, like flash paper.  The other papers burn more slowly, and release red (for the 'runner up') or white (for the 'winner') smoke, respectively.

   The runner up waits on the winner hand and foot for three days, and then the winner is killed and eaten cannibalistically, with a strong religious 'ascension' dogma.



Depending on your point of view, this is a lottery you may or may not want to win, and also one which there would be great advantage in being able to rig to ensure a particular winner.  So my questions are:

What chemistry could you use in the papers and candles to achieve the effects shown?
Smokeless and quick burning isn't hard to achieve, just use flash paper. For white smoke, I would use flash paper again but with a white oxide powder such as titanium oxide with a flame retardant to slow the burn. For red, again flash paper but, you need a compound that releases bromine when burned. I think copper(i) bromide or silver(i) bromide would be ideal as both are easy to decompose and tolerant to moisture in air, though silver bromide is not tolerant to prolonged light exposure. These salts may discolor the paper and you may need to color the non-red smoke papers to make them all look the same.