Animation Visualization in R Studio

in this assignment i was given the chance to create create a simple animation. Animation is a great way of presenting your data and keeping your audience interested in what you are sharing. below is a code of animation i use. 

Code:

saveGIF(ani.options(interval = 0.2, nmax = 50)
+ par(mar = c(4, 4, 0.2, 0.2))
Error: unexpected symbol in:
"saveGIF(ani.options(interval = 0.2, nmax = 50)
par"
> Rosling.bubbles())
Error: unexpected ')' in "Rosling.bubbles())"
> saveGIF(Rosling.bubbles())
Output at: animation.gif
[1] TRUE