diff --git a/main.c b/main.c
index 65a6954..a745426 100644
--- a/main.c
+++ b/main.c
@@ -78,7 +78,9 @@ int main(int argc, char *argv[])
   Camera2D camera  = {0};
   camera.zoom      = 1.0f;
 
+  // Initialise mutex for threads to use
   pthread_mutex_init(&mutex, NULL);
+  // Setup quadrants (for threads)
   struct StepArg a = {&state, 0, state.dwidth / 2, 0, state.dwidth / 2};
   struct StepArg b = {&state, 0, state.dwidth / 2, state.dwidth / 2,
                       state.dwidth};
@@ -86,6 +88,7 @@ int main(int argc, char *argv[])
                       state.dwidth / 2};
   struct StepArg d = {&state, state.dwidth / 2, state.dwidth, state.dwidth / 2,
                       state.dwidth};
+  // Setup threads
   pthread_t thread_a, thread_b, thread_c, thread_d;
   pthread_create(&thread_a, NULL, &compute_thread, &a);
   pthread_create(&thread_b, NULL, &compute_thread, &b);