How to create movie from images?

Question

I'd like to create a movie from images. I know create the images, but I don't know how get together it. Below it is a mwe.

setwd("...") #work space
x <- matrix(runif(20), ncol = 2)
for(i in 1:nrow(x)){
  name = paste('0',i,'plot.png', sep='')
  png(name)
  plot(x[i, 1], x[i,2], xlim = c(-1.5, 1.5), ylim = c(-1.5, 1.5))
  dev.off()
}

This questions is very similar with Creating a Movie from a Series of Plots in R, but the links are outdated. And no solve the problem.