Good job adding to what you see as an "issue", so STFU
Good job adding to what you see as an "issue", so STFU
The tutorial is not for a particle based trail effect, but rather for a frame manipulation trail. This means that the animation is being overlaid upon itself, and each iteration of the animation is playing a previous frame with decreasing alpha value, giving it a disappearing trail effect. So you cannot modify the distance each subsequent image is to the main image.