diff --git a/README.md b/README.md
index e23134c..90f913d 100644
--- a/README.md
+++ b/README.md
@@ -137,6 +137,33 @@ defaults write com.apple.TimeMachine DoNotOfferNewDisksForBackup -bool true
 
 ## Developer
 
+### Icons
+
+#### Create App Icon
+Function to quickly create an application icon from 1024px master file.
+```bash
+function mkicns() {
+    if [[ -z "$@" ]]; then
+        echo "Input file missing"
+    else
+        filename=${1%.*}
+        mkdir $filename.iconset
+        sips -z 16 16   $1 --out $filename.iconset/icon_16x16.png
+        sips -z 32 32   $1 --out $filename.iconset/icon_16x16@2x.png
+        sips -z 32 32   $1 --out $filename.iconset/icon_32x32.png
+        sips -z 64 64   $1 --out $filename.iconset/icon_32x32@2x.png
+        sips -z 128 128 $1 --out $filename.iconset/icon_128x128.png
+        sips -z 256 256 $1 --out $filename.iconset/icon_128x128@2x.png
+        sips -z 256 256 $1 --out $filename.iconset/icon_256x256.png
+        sips -z 512 512 $1 --out $filename.iconset/icon_256x256@2x.png
+        sips -z 512 512 $1 --out $filename.iconset/icon_512x512.png
+        cp $1 $filename.iconset/icon_512x512@2x.png
+        iconutil -c icns $filename.iconset
+        rm -r $filename.iconset
+    fi
+}
+```
+
 ### Vim
 
 #### Compile Sane Vim