You can't catch up: Once you are behind you can never recover

gistfile1.txt

Mix.install([
  {:vega_lite, "~> 0.1.0"},
  {:kino, "~> 0.2.1"}
])

alias VegaLite, as: Vl

vl_widget =
  Vl.new(width: 400, height: 400)
  |> Vl.mark(:line)
  |> Vl.encode_field(:x, "x", type: :quantitative)
  |> Vl.encode_field(:y, "y", type: :quantitative)
  |> Kino.VegaLite.new()
  |> Kino.render()

total = 0;

for i <- 1..26 do
  total = i * 10
  point = %{x: i, y: total}
  Kino.VegaLite.push(vl_widget, point)
  Process.sleep(25)
end