say i wanted to animate a sphere and as it moved a blue streak would appear behind it in the path that it travelled. but would only appear when the sphere moves and would dissappear at a rate i could set.. how would i go about doing something like that?



im trying out
particles -> emit from object

but i cant get the particles to show up in a render, am i doing this correctly or should igo about this some other way?


some screens:

https://free.hostrocket.com/~pakihos/01.gif
https://free.hostrocket.com/~pakihos/02.gif