add -c flag to autopape.sh

autopape.sh

@@ -1,17 +1,20 @@
 #!/bin/sh
 # simple script to loop through each image in a directory and set said image as wallpaper for a specififed interval using feh
 
+command="feh --bg-fill"
 interval="1m"
 
+while getopts 'c:i:' flag; do
+    case "${flag}" in
+        c)
+            command="${OPTARG}";;
 
-while getopts 'i:' flag; do
-  case "${flag}" in
         i) 
             interval="${OPTARG}";;
         *)
             echo "Unrecognised option"
             exit 1;;
-  esac
+    esac
 done
 
 
@@ -19,7 +22,7 @@ while [ true ]
 do
     for img in *
     do
-        feh --bg-fill "$img"
+        eval "$command" "$img"
         sleep "$interval"
     done
 done