have paths fade away in gganimate

Question

I am trying to plot multiple paths in a gganimate plot. I want the lines to fade out over the last N frames (e.g. N=5 in this example).

The data look like this:

set.seed(27)
df <- data.frame(Frame = rep(1:10, 3),
                 id = factor(rep(1:3, each = 10)),
                 x = runif(30),
                 y = runif(30))

head(df)

  Frame id          x          y
1     1  1 0.97175023 0.14257923
2     2  1 0.08375751 0.47864658
3     3  1 0.87386992 0.05182206
4     4  1 0.32923136 0.25514379
5     5  1 0.22227551 0.14262912
6     6  1 0.40164822 0.48288482

I tried to make the plot using shadow_mark, but this doesn't appear to have the lines fade out over time.

df %>%
  ggplot(aes(x = x, y = y, group = id, color = id)) +
  geom_path() +
  geom_point()+
  scale_color_manual(values=c("red","blue","green")) +
  transition_reveal(along = Frame) +
  shadow_mark(size = 0.75) +
  theme_void()

This just produces the below:

Is there a way to make these lines fade. Ideally, I'm just plotting a rolling path of N frames.