Fancy IEx config

.iex.exs

# IEx.configure colors: [enabled: true]
# IEx.configure colors: [eval_result: [:cyan, :bright]]
{fortune, 0} = System.cmd "fortune", [] # displays the fortune prompt
IO.puts IO.ANSI.red_background() <> IO.ANSI.white() <> "▷ #{fortune}" <> IO.ANSI.reset
Application.put_env(:elixir, :ansi_enabled, true)
IEx.configure(
 colors: [
   eval_result: [:green, :bright] ,
   eval_error: [[:red, :bright, "\n▶▶▶\n"]],
   eval_info: [:yellow, :bright ],
 ],
 default_prompt: [
   "\e[G", # cursor ⇒ column 1
    :green, "%prefix", :white, "|", :green, "%counter", " ", :blue, "▶", :reset
  ] |> IO.ANSI.format |> IO.chardata_to_string
)