diff --git a/src/new_col.c b/src/new_col.c
index d7d6d17..2b2f7d9 100644
--- a/src/new_col.c
+++ b/src/new_col.c
@@ -38,3 +38,14 @@ int new_brick () {
 	}
 	return 0;
 }
+
+// rotate (cycle) tiles in brick by 1
+int rotate_col (void)
+{
+	int temp;
+	temp = tile_current[0];
+	tile_current[0] = tile_current[1];
+	tile_current[1] = tile_current[2];
+	tile_current[2] = temp;
+	return 0;
+}