Place a smaller terracotta pot into the bigger one. Stick the bolt up through the larger pot's drainage hole, place the smaller one directly on it, then fasten the bolt with a nut.
on the floor, place a few candles on it, light them, then lay the bricks around them. Place the pots upside down on the brick path to cover the flames.
Since terracotta is fire-resistant and an excellent insulator that can trap heat and retain it for a long time, it will provide your immediate surroundings with cozy warmth.