#!/bin/sh

data="$HOME/.local/share/misc/welcome/data"
line=1

while true; do 
  clear; sed -n "$line,+4p" "$data"
  printf "\n%s\n" "Press [ SHIFT ] + [ F1 ] to open the manual, Press [ CTRL ] + [ C ] to exit"

  line=$((line+5))

  [ "$(wc -l < "$data")" -lt "$line" ] && line=1
  sleep 5
done