diff --git a/patterns.c b/patterns.c
new file mode 100644
index 0000000..cebd574
--- /dev/null
+++ b/patterns.c
@@ -0,0 +1,64 @@
+/*
+** patterns.c - <+DESC+>
+**
+** 2014 - Frank Villaro-Dixon <Frank@Villaro-Dixon.eu>
+*/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include "game.h"
+#include "obs.h"
+
+
+
+void
+pattern_copyleft(struct s_game *g) {
+	int times;
+	int cleared_face = rand() % g->polygon_type;
+	int max_dist = get_max_obs_dist(g);
+
+	for(times = 0; times < g->polygon_type; times++) {
+		if(times != cleared_face) {
+			struct s_obstacle o;
+			o = create_obstacle(SHAPE_THICK, times, 1, max_dist + K_CLEARANCE);
+			add_obstacle(g, o);
+		}
+	}
+}
+
+void
+pattern_schenille(struct s_game *g) {
+	int times;
+	int cleared_face = rand() % g->polygon_type;
+	int max_dist = get_max_obs_dist(g);
+
+	int dir = 1 - 2 * (rand()%2);
+
+	int leng = rand()%7 + 10;
+
+	for(times = 0; times < leng; times++) {
+		struct s_obstacle o;
+		o = create_obstacle(SHAPE_THICK,
+		                    cleared_face,
+		                    1,
+		                    max_dist + K_CLEARANCE + times*SHAPE_THICK);
+		add_obstacle(g, o);
+
+		cleared_face += dir;
+		CLEVER_MODULO(cleared_face, g->polygon_type);
+	}
+}
+
+
+void
+add_pattern(struct s_game *g) {
+	int n_patterns = 2;
+	void (*patterns[])(struct s_game *g) = {pattern_copyleft,
+	                                        pattern_schenille};
+
+	int choosen_pattern = rand() % n_patterns;
+
+	patterns[choosen_pattern](g);
+}
+
+
diff --git a/patterns.h b/patterns.h
new file mode 100644
index 0000000..4067934
--- /dev/null
+++ b/patterns.h
@@ -0,0 +1,14 @@
+/*
+** patterns.h - <+DESC+>
+**
+** 2014 - Frank Villaro-Dixon <Frank@Villaro-Dixon.eu>
+*/
+
+#ifndef PATTERNS_H
+#define PATTERNS_H
+
+void
+add_pattern(struct s_game *g);
+
+#endif /* ndef PATTERNS_H */
+