#!/bin/bash

while true; do
  FORTUNE=$(fortune -ce /usr/share/games/fortunes)
  SOURCE=$(sed '1s/(\(.*\))/\1/;q' <<<"$FORTUNE")
  TEXT=$(tail +3 <<<"$FORTUNE")
  printf '\033[2J\033[H'
  echo '['"$SOURCE"']'
  sleep 2s
  echo -n "$TEXT"
  sleep $(( (${#TEXT} / 20) + 10 ))s
done