Arduino blinkenlights testscript

test.sh

#!/bin/sh
EFFECTS=('1' '2' '4' '8' '16' '32' '64' '128');

while true; do
    RED=$[ ( $RANDOM % 256 )];
    GREEN=$[ ( $RANDOM % 256 )];
    BLUE=$[ ( $RANDOM % 256 )];

    EFFECT=${EFFECTS[$RANDOM % ${#EFFECTS[@]} ]};

    URL="http://192.168.178.44/?red=$RED&green=$GREEN&blue=$BLUE&effect=$EFFECT";

    echo $URL;
    echo "\n";

    curl $URL &> /dev/null;

    sleep 5;
done