KITT grill visual from Knight Rider

lights.climagic.sh

#!/bin/bash

vNbLights=9
vWidth=3
vSleep=0.5

function sendRequest() {
    nc -w0 -u lights.climagic.com 45444 <<< $1
}

echo "Go to http://lights.climagic.com/ and start the video stream"

while true; do
    read -p "Do you want to see KITT in action? [y]/n"
    case $yn in
        [Nn]* ) exit;;
        * ) break;;
    esac
done

echo "Turn off all the lights"

sendRequest CLEAR

echo "And GO"

sleep 1

vStart=1
vEnd=$(echo "$vNbLights + $vWidth" | bc)
while true; do
    for i in $(seq $vStart $vEnd);
    do
        vPrev=$(echo "$i - $vWidth" | bc)
        if [ $i -le $vNbLights ]; then
            vLights="$i"
            if [ $vPrev -gt 0 ]; then
                vLights="$vLights$vPrev"
            fi
        else
            vLights="$vPrev"
        fi
        
        sendRequest $vLights

        sleep $vSleep
    done
    
    vTmp=$vStart
    vStart=$vEnd
    vEnd=$vTmp
    
    sleep $vSleep
done