How to spawn particles behind the player?

I’m trying to make it so that there spawn ‘fire’ particles behind the player when the player doesn’t move, but they won’t show. Does anyone have a clue what I did wrong?

Character with boxcollision ‘Fire Box’

Blueprint, the game won’t show the printstring tekst either

Add a particle emitter component to the player bp, add your emitter to it. Adjust it, then add the code speed > 0 float to the Player AnimBP, on the Update Event, if false add behind the branch, DoOnce SetVisibility of the Particle Emitter inside your Player BP to visible. On true add also a DoOnce, also after the Set Visibility nodes make a connection to the opposite Reset input of the DoOnce nodes.