Start support for second level

main.c

@@ -0,0 +1,9 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include "02h.h"
+
+int main() {
+  struct level2* level2 = fillLevel2(level2);
+  debugLevel2(level2);
+  freeLevel2(level2);
+}