Only one simple command:
>
> "Player" Movement speed > 0 >>>
> - "Player" spawn "Particle" on layer n (Image Point x)
> - "Particle" move behind "Player"
>
>
Where the "Particle" object is a Sprite with FADE behaviour, that disappears after a certain time.
Change the duration of the fade, affects the length of the trail.
"Player" is a Sprite with a Movement behaviour (8Direction, Car, Platform, etc).
For the trail direction, this isn't necessary because the trail always goes in the opposite direction of the motion.
I also made a capx: dropbox.com/s/ajc71c4lg8ec9 ... .capx?dl=0
Thanks for the quick reply, I will try this out!