Extract colours into their own little module

lib/colours.ex

@@ -0,0 +1,13 @@
+defmodule Colours do
+  alias IO.ANSI
+
+  def red(str), do: colourize(ANSI.red, str)
+
+  def cyan(str), do: colourize(ANSI.cyan, str)
+
+  def green(str), do: colourize(ANSI.green, str)
+
+  defp colourize(color, message) do
+    Enum.join([color, message, ANSI.reset], "")
+  end
+end