This are some little helping scripts found somewhere in the internet...
Markus Kuhn [ˈmaʳkʊs kuːn] http://www.cl.cam.ac.uk/~mgk25/ — 2002-07-25 CC BY
curl -s https://www.cl.cam.ac.uk/\~mgk25/ucs/examples/UTF-8-demo.txt | cat
Tom Hale, 2016. MIT Licence.
Print out 256 colours, with each number printed in its corresponding colour
See [http://askubuntu.com/questions/821157/print-a-256-color-test-pattern-in-the-terminal/821163#821163]
curl -s https://gist.githubusercontent.com/HaleTom/89ffe32783f89f403bba96bd7bcd1263/raw/ | bash