There is such a trick - two candles are taken, their wicks cross, a slight smoke appears and they light up. The secret is that one wick is saturated with glycerin, the second with potassium permanganate. So, today we mix glycerin with potassium permanganate ("potassium permanganate").
ATTENTION! DO NOT REPEAT IT! IT IS DANGEROUS!
Writing something does not make sense, because everything is visible on the animation:
Source: licrym.org
