[ ! -d "/sys/class/gpio/gpio49" ] && echo 49 > /sys/class/gpio/export
[ ! -d "/sys/class/gpio/gpio50" ] && echo 50 > /sys/class/gpio/export

echo out > /sys/class/gpio/gpio49/direction
echo out > /sys/class/gpio/gpio50/direction

echo 0 > /sys/class/gpio/gpio49/active_low
echo 0 > /sys/class/gpio/gpio50/active_low

echo 0 > /sys/class/gpio/gpio49/value

usleep 10000

echo $1 > /sys/class/gpio/gpio49/value
echo $2 > /sys/class/gpio/gpio50/value

usleep 10000

echo 0 > /sys/class/gpio/gpio49/value
echo 0 > /sys/class/gpio/gpio50/value