Java 26.2
Particles
Position
Delta
Flame
20 particles at ~ ~1 ~
/particle minecraft:flame ~ ~1 ~ 0.25 0.5 0.25 0.01 20 normal
The /particle command takes more positional arguments than most: after the particle id come the position, the delta that spreads the particles, a speed value and a count. Several particles also take their own parameters — dust needs a colour and a scale. Fill them in here rather than counting arguments by hand.
Visual effects
Java 26.2
Position
Delta
20 particles at ~ ~1 ~
/particle minecraft:flame ~ ~1 ~ 0.25 0.5 0.25 0.01 20 normal