diff --git a/AutomaticBrightness.sh b/AutomaticBrightness.sh
old mode 100644
new mode 100755
index 20061fc..23c8eb7
--- a/AutomaticBrightness.sh
+++ b/AutomaticBrightness.sh
@@ -1,31 +1,31 @@
 #!/bin/bash
 
-#How much light change must be seen by the sensor befor it will act
+#How much light change must be seen by the sensor before it will act
 LightChange=10
 
 #How often it check the sensor
 SensorDelay=1
 
-# Scale sesor to displas brightness range
+# Scale sensor to display brightness range
 # NOW WITH FLOAT SUPPORT
 SensorToDisplayScale=1
 
-#This should match your refesh rate other wise it will either change the back light more times than needed or too few for a smooth animation
-LevelSteps=31
-# The is should match the LevelSteps but in the acual time each event should take to see
-AnimationDelay=0.016
+# 12 steps is the most similar on a Macbook 2017 running Arch compared to MacOS
+LevelSteps=12
+# Plays the 12 step effectively at 30 FPS 32ms
+AnimationDelay=0.032
 
 
 # Read the variable names
-MinimumBrightness=050
+MinimumBrightness=001
 
 
 
-# 2 : Default | 1 : Add Offset | 0 : Subtract Offset, Recomended not to change
+# 2 : Default | 1 : Add Offset | 0 : Subtract Offset, Recommended not to change
 op=2
 
 
-# Only look for flags -i or -d with an aditional value
+# Only look for flags -i or -d with an additional value
 # AutomaticBrightness.sh -i 100
 while getopts i:d: flag
 do
@@ -37,7 +37,7 @@ do
     esac
 done
 
-# Verigy offset file exsits and if so read it
+# Verify offset file exists and if so read it
 if [[ -f /dev/shm/AB.offset ]]
 then
   OffSet=$(cat /dev/shm/AB.offset)
@@ -50,7 +50,7 @@ fi
 #if no offset or its less than 0 make 0
 OffSet=$((OffSet < 0 ? 0 : OffSet))
 
-# relativly change number in Offset file and write it
+# relatively change number in Offset file and write it
 if [[ $op -lt 2 ]]
 then
   if [[ $op -eq 1 ]]
@@ -84,18 +84,11 @@ MaxScreenBrightness=$(find -L /sys/class/backlight -maxdepth 2 -name "max_bright
 BLightPath=$(find -L /sys/class/backlight -maxdepth 2 -name "brightness" 2>/dev/null | grep "brightness")
 
 # Set path to current luminance sensor
+LSensorPath=$(find -L /sys/bus/iio/devices -maxdepth 2  -name "in_illuminance_raw" 2>/dev/null | grep "in_illuminance_raw")
 
 
 #Set the current light value so we have something to compare to
-if [[ -f /dev/shm/AB.offset ]]
-then
-    OffSet=$(cat /dev/shm/AB.offset)
-else
-    OffSet=0
-    $(echo $OffSet > /dev/shm/AB.offset)
-    $(chmod 666 /dev/shm/AB.offset)
-fi
-OldLight=$(($OffSet))
+OldLight=$(cat $LSensorPath)
 
 while true
 do
@@ -108,8 +101,9 @@ do
       $(chmod 666 /dev/shm/AB.offset)
     fi
 
+		Light=$(cat $LSensorPath)
     ## apply offset to current light value
-    Light=$((OffSet))
+    Light=$((Light + OffSet))
 
     # Set allowed range for light 
     
@@ -123,15 +117,15 @@ do
 
 		  CurrentBrightness=$(cat $BLightPath)
 
-      # Add MinimumBrighness here to not effect comparison but the outcome
-		  Light=$(( $Light + $MinimumBrightness ))
+      # Add MinimumBrightness here to not effect comparison but the outcome
+      Light=$(LC_NUMERIC=C printf "%.0f" $(echo "scale=2; $Light +  (  ($MaxScreenBrightness  * ( $MinimumBrightness / 100 )) / $SensorToDisplayScale )  " | bc ))
       
-      # Gernate a TempLight value for the screen to be set to
+      # Generate a TempLight value for the screen to be set to
       # Float math thanks Matthias_Wachter 
-      TempLight=$(LANG=C printf "%.0f" $(echo "scale=2; $Light * $SensorToDisplayScale" | bc))
+      TempLight=$(LC_NUMERIC=C printf "%.0f" $(echo "scale=2; $Light * $SensorToDisplayScale" | bc))
 
 
-      # Check we dont ask the screen to go brighter than it can
+      # Check we do not ask the screen to go brighter than it can
 		  if [[ $TempLight -gt $MaxScreenBrightness ]]
 		  then
 			  NewLight=$MaxScreenBrightness
@@ -139,8 +133,8 @@ do
 			  NewLight=$TempLight
 		  fi
 
-      # How diffrent should each stop be
-      DiffCount=$(LANG=C printf "%.0f" $(echo "scale=2; ( $NewLight - $CurrentBrightness ) / $LevelSteps" | bc ))
+      # How different should each stop be
+      DiffCount=$(LC_NUMERIC=C printf "%.0f" $(echo "scale=2; ( $NewLight - $CurrentBrightness ) / $LevelSteps" | bc ))
 
       # Step once per Screen Hz to make animation
 		  for i in $(eval echo {1..$LevelSteps} )
@@ -162,7 +156,7 @@ do
                   echo $FakeLight > $BLightPath
               fi
 
-        # Format values apropriatly for brightnessctl
+        # Format values appropriately for brightnessctl
 			  #if [[ $NewLight -lt 0 ]]
 			  #then
 			  #NewLight=$( echo "$NewLight" | awk -F "-" {'print$2'})
@@ -171,7 +165,7 @@ do
 			  #NewLight=$(echo +$NewLight)
 			  #fi
 
-        # Adjust brightness relativly
+        # Adjust brightness relatively
 			  #brightnessctl -q s $NewLight
         # Sleep for the screen Hz time so he effect is visible
 			  sleep $AnimationDelay
diff --git a/README.md b/README.md
index 21870d8..5fe392f 100644
--- a/README.md
+++ b/README.md
@@ -7,8 +7,15 @@ made for the FrameWork laptop
 
 based on 2017 MacBook Pro
 
+
 read ```Configuration``` for detailed informatoion about what options you have to easily  customize/ adjust the bightness or animation speed
 
+## Updating
+Run ```git pull``` to download the latest version
+
+Then run ```./setup -u``` to update the the service and script running on your system with newly downloaded / modifyed versions
+
+
 ## Requires 
 ```bc```
 For running as your user you need to be part of the ```video``` group 
diff --git a/setup.sh b/setup.sh
index 85f7af1..628a942 100755
--- a/setup.sh
+++ b/setup.sh
@@ -1,11 +1,11 @@
 #!/bin/bash
 #
 case $1 in
-        -u) echo "Updading Mac-like-automatic-brightness..."
+        -u) echo "Updating Mac-like-automatic-brightness..."
           echo "Stopping AB service..."
           sudo systemctl kill AB
           echo "Updating AutomaticBrightness.sh..."
-          echo "Cloning AutomaticBrighness.sh..."
+          echo "Cloning AutomaticBrightness.sh..."
           sudo cp AutomaticBrightness.sh /usr/local/bin/AutomaticBrightness.sh
           echo "Updating AB.service for systemD..."
           echo "Cloning AB.service for systemD..."
@@ -44,14 +44,15 @@ then
     awk -v new_phrase="$NewStep" '/LevelSteps=/{ print new_phrase; next } 1' AutomaticBrightness.sh  > temp && mv temp AutomaticBrightness.sh
 fi
 
-echo "Cloning AutomaticBrighness.sh..."
+echo "Cloning AutomaticBrightness.sh..."
 sudo cp AutomaticBrightness.sh /usr/local/bin/AutomaticBrightness.sh
+sudo chmod u+x /usr/local/bin/AutomaticBrightness.sh
 
 echo "Cloning AB.service for systemD..."
 sudo cp AB.service /etc/systemd/system/AB.service
 
 
-echo "Startin Service..."
+echo "Starting Service..."
 sudo systemctl enable AB
 sudo systemctl start AB