diff --git a/led-bash.sh b/led-bash.sh
index 595ce64..b39c502 100755
--- a/led-bash.sh
+++ b/led-bash.sh
@@ -1,11 +1,8 @@
 #! /bin/bash
 
-LED0=/sys/class/leds/beaglebone:green:usr0 
-LED1=/sys/class/leds/beaglebone:green:usr1
+LED0=/sys/class/leds/beaglebone:green:usr
+NUM=$1
 
-echo "none"	 >> $LED0/trigger
-echo "1"	 >> $LED0/brightness
-
-echo "none"	>> $LED1/trigger
-echo "1"	>> $LED1/brightness
+echo "none"	 >> $LED0$NUM/trigger
+echo "1"	 >> $LED0$NUM/brightness
 echo "script done"