sequential_random_collision.sh

RANGES="100 1000 10000 100000"

for RANGE in $RANGES; do 
    echo "Generating random numbers with a ceiling of $RANGE"
    while :; do
        nowtest=$((RANDOM%$RANGE+0))
        echo -n $nowtest
        [[ $nowtest == $lasttest ]] && echo  && echo "found side by side collision after $tests tests" && break
        let tests++
        lasttest=$nowtest
        echo -ne '\b\b\b\b\b\b\b\b\b'
    done
    echo
done