cat scripts/fan.sh 
#!/bin/bash

WAIT=0.5

gpio mode 10 out
gpio mode 6 out
gpio mode 5 out

while true; do

	gpio write 10  0
	gpio write 6 0
	gpio write 5 0

	sleep $WAIT
	
	gpio write 10  1
	gpio write 6 1
	gpio write 5 1

	sleep $WAIT

done