#!/bin/sh
while true; do
 echo "1" > /sys/class/gpio/gpio17/value
 sleep 0.5;
 echo "0" > /sys/class/gpio/gpio17/value
 sleep 0.5;
done


##################################

for ((i=1; i <= 10; i++))

do

gpio write 4 1

sleep 0.5s

gpio write 4 0

sleep 0.5s

done

###################################

while true; do
gpio write 4 1

sleep 0.5s

gpio write 4 0

sleep 0.5s

done