diff --git a/lib/processing.ml b/lib/processing.ml
index a42fb1b..e30a37e 100644
--- a/lib/processing.ml
+++ b/lib/processing.ml
@@ -18,17 +18,18 @@ module Culriser = struct
   type filter = (colour -> bool) list
   type sort = int array
 
-  let run_filters f el =
+  let run_filters (f : filter) el =
     List.fold_left (fun res filt -> if not (filt el) then false else res) true f
 
-  let create ?(s = [| 0; 1; 2; 3; 4; 5; 6; 7; 8; 9; 10; 11; 12; 13; 14; 15 |])
-      ?(f = []) c =
+  let create s f c =
     let ( @ ) = Array.append in
     let colours =
-      c |> permute s
-      |> Array.fold_left
-           (fun acc el -> if run_filters f el then acc @ [| el |] else acc)
-           [||]
+      c |> permute s |> fun c ->
+      if List.length f > 0 then
+        Array.fold_left
+          (fun acc el -> if run_filters f el then acc @ [| el |] else acc)
+          [||] c
+      else c
     in
     { colours; sz = Array.length colours; current = 0 }
 
@@ -39,12 +40,12 @@ module Culriser = struct
 
   let reset t = t.current <- 0
 
-  let add_colour t serialiser chunk =
+  let serialise_with_colour t serialiser chunk =
     (match chunk with
     | Separator _ -> Emitter.serialise serialiser (Ansi [ Fg (next t) ])
     | Delimiter _ ->
         reset t;
         Emitter.serialise serialiser (Ansi [ Fg (next t) ])
     | _ -> ());
-    chunk
+    Emitter.serialise serialiser chunk
 end