#!/bin/sh

# molentje - display a turning windmill, full screen
#
# a windmill is drawn by displaying - \ | / repeatedly
#
# by Joost van Baal-Ilić, 2024
# this code is in the public domain, no copyright is claimed
#
# Needs 'sm' : http://github.com/nomeata/screen-message by Joachim Breitner
# Press control-q to quit (or esc-esc)

slaap='sleep 1'
slaap='sleep 0.15'
slaap='sleep 0.2'

# % find /usr/share/fonts/truetype -type f | grep -i mono
font='-n LiberationMono-Regular'
font='-n Freemono'
font='-n VeraMono'
font=''

while $slaap
do
  printf -- '--\f'
  $slaap
  printf '\\\f'
  $slaap
  printf '|\f'
  $slaap
  printf '/\f'
done | sm -i $font -