https://www.freecodecamp.org/learn/relational-database/learn-bash-scripting-by-building-five-programs/build-five-programs

bingo.sh

#!/bin/bash

# Bingo Number Generator

echo -e "\n~~ Bingo Number Generator ~~\n"

NUMBER=$(( RANDOM % 75 + 1 ))
TEXT="The next number is, "

if (( NUMBER <= 15 ))
then
  echo $TEXT B:$NUMBER
elif [[ $NUMBER -le 30 ]]
then
  echo $TEXT I:$NUMBER
elif (( NUMBER < 46 ))
then
  echo $TEXT N:$NUMBER
elif [[ $NUMBER -lt 61 ]]
then
  echo $TEXT G:$NUMBER
else
  echo $TEXT O:$NUMBER
fi

countdown.sh

#!/bin/bash

# Program that counts down to zero from a given argument

echo -e "\n~~ Countdown Timer ~~\n"

if [[ $1 -gt 0 ]]
then
  : '
  for (( i = $1; i >= 0; i-- ))
  do
    echo $i
    sleep 1
  done
  '

  I=$1

  while [[ $I -ge 0 ]]
  do
    echo $I
    (( I-- ))
    sleep 1
  done
else
  echo Include a positive integer as the first argument.
fi

fortune.sh

#!/bin/bash

# Program to tell a persons fortune

echo -e "\n~~ Fortune Teller ~~\n"

RESPONSES=("Yes" "No" "Maybe" "Outlook good" "Don't count on it" "Ask again later")
N=$(( RANDOM % 6 ))

function GET_FORTUNE() {
  if [[ ! $1 ]]
  then
    echo Ask a yes or no question:
  else
    echo Try again. Make sure it ends with a question mark:
  fi

  read QUESTION
}

GET_FORTUNE

until [[ $QUESTION =~ \?$ ]]
do
  GET_FORTUNE again
done

echo -e "\n$RESPONSES[$N]"

questionnaire.sh

#!/bin/bash

echo -e "\n~~ Questionnaire ~~\n"

QUESTION1="What's your name?"
QUESTION2="Where are you from?"
QUESTION3="What's your favorite coding website?"

echo $QUESTION1
read NAME

echo $QUESTION2
read LOCATION

echo $QUESTION3
read WEBSITE

echo -e "\nHello $NAME from $LOCATION. I learned that your favorite coding website is $WEBSITE!"