36 files changed, 332 insertions, 176 deletions

diff --git a/src/controller/callbacks/display.h b/src/controller/callbacks/display.h
new file mode 100644
index 0000000..a57ba8f
--- a/dev/null
+++ b/src/controller/callbacks/display.h
@@ -0,0 +1,9 @@
+#ifndef DISPLAY_H
+#define DISPLAY_H
+
+/*
+ * Draw the contents of the window.
+ */
+void display (void);
+
+#endif // DISPLAY_H