diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..669e6ed
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "src/ccolour"]
+	path = src/ccolour
+	url = https://github.com/RolandWH/ccolour.git
diff --git a/src/bsrch.c b/src/bsrch.c
index 64cbfad..5b66f35 100644
--- a/src/bsrch.c
+++ b/src/bsrch.c
@@ -1,3 +1,10 @@
+/*
+ * Filename: bsrch.c
+ * Author(s): Roland (r.weirhowell@gmail.com)
+ * Description: Perform binary search on an integer array
+ * License: MIT (https://spdx.org/licenses/MIT.html)
+*/
+
 #include "bsrch.h"
 
 #include <stdbool.h>
diff --git a/src/bsrch.h b/src/bsrch.h
index f464723..c4f683f 100644
--- a/src/bsrch.h
+++ b/src/bsrch.h
@@ -1,3 +1,10 @@
+/*
+ * Filename: bsrch.h
+ * Author(s): Roland (r.weirhowell@gmail.com)
+ * Description: Header file for bsrch.c
+ * License: MIT (https://spdx.org/licenses/MIT.html)
+*/
+
 #pragma once
 #include <stddef.h>
 
diff --git a/src/bubble.c b/src/bubble.c
index 7541f18..27d4ff6 100644
--- a/src/bubble.c
+++ b/src/bubble.c
@@ -1,3 +1,10 @@
+/*
+ * Filename: bubble.c
+ * Author(s): Roland (r.weirhowell@gmail.com)
+ * Description: Perform bubble sort on an array of integers
+ * License: MIT (https://spdx.org/licenses/MIT.html)
+*/
+
 #include "bubble.h"
 
 #include <stdbool.h>
diff --git a/src/bubble.h b/src/bubble.h
index 39d0387..0fd2700 100644
--- a/src/bubble.h
+++ b/src/bubble.h
@@ -1,3 +1,10 @@
+/*
+ * Filename: bubble.h
+ * Author(s): Roland (r.weirhowell@gmail.com)
+ * Description: Header file for bubble.c
+ * License: MIT (https://spdx.org/licenses/MIT.html)
+*/
+
 #pragma once
 #include <stddef.h>
 
diff --git a/src/ccolour b/src/ccolour
new file mode 160000
index 0000000..090d94e
--- /dev/null
+++ b/src/ccolour
@@ -0,0 +1 @@
+Subproject commit 090d94e7cde01c970f042290811b751fc8fe25d0
diff --git a/src/ceesort.c b/src/ceesort.c
index cc357da..bcb27d2 100644
--- a/src/ceesort.c
+++ b/src/ceesort.c
@@ -1,5 +1,13 @@
+/*
+ * Filename: ceesort.c
+ * Author(s): Roland (r.weirhowell@gmail.com)
+ * Description: Main file to handle I/O and calling fucntions
+ * License: MIT (https://spdx.org/licenses/MIT.html)
+*/
+
 #include "bubble.h"
 #include "bsrch.h"
+#include "ccolour/colour.h"
 
 #include <ctype.h>
 #include <stdbool.h>
@@ -7,6 +15,13 @@
 #include <stdlib.h>
 
 
+inline void quit_err(const char* msg)
+{
+    ChangeColour(msg, RED_FOREGROUND, DEFAULT_COLOR, true);
+    exit(EXIT_FAILURE);
+}
+
+
 bool isint(char* s)
 {
     for (int i = 0; s[i]; i++)
@@ -22,10 +37,7 @@ bool isint(char* s)
 int main(int argc, char** argv)
 {
     if (argc < 2)
-    {
-        puts("ERROR: Must have at least one argument (number)");
-        return -1;
-    }
+        quit_err("ERROR: Must have at least one argument (number)\n");
 
     int* arr = malloc((argc - 1) * sizeof(int));
     for (int i = 1; i < argc; i++)