diff --git a/page_begin/page_begin.c b/page_begin/page_begin.c
index e69de29..00bcca5 100644
--- a/page_begin/page_begin.c
+++ b/page_begin/page_begin.c
@@ -0,0 +1,8 @@
+#include "page_begin.h"
+
+void *page_begin(void *ptr, size_t page_size)
+{
+    size_t quelenfer = ((size_t)ptr) & ~(page_size - 1);
+    char *pointeur_alacon = NULL;
+    return pointeur_alacon + quelenfer;
+}