How do i make a tron trail that disapears overtime

Like this

bump

Straight lines are easier - just use a series of rectangles with fade behind the player.

Curves are harder, but you can do something like to make it smooth , just add lines between the circles.

the tron trails dont curve but they just turn with the users direction to whatever angle then when the player turns the trail turns again even if it leaves behind other trails

Here's a basic example.

https://www.dropbox.com/s/iibxsiziku7g0wl/tron.c3p?dl=0

O man that's right on, thank you!