diff -urN wf-/data.c wf/data.c
--- wf-/data.c	Wed Jan  6 00:00:00 2016
+++ wf/data.c	Fri Jan  8 00:00:00 2016
@@ -43,6 +43,7 @@
 	CASE_RET(type_copy_mirror);
 	CASE_RET(type_copy_timeshift);
 	CASE_RET(type_copy_timeshift_rot);
+	CASE_RET(type_recursive);
 	CASE_RET(type_test_conv);
 	default: break;
 	}
@@ -663,6 +664,23 @@
 	}
 }
 
+static void
+op_data_recursive(struct recursive *r, data_t *data, prm_t *prm)
+{
+	data_t op = { type_arr, (data_t[]){
+	  *r->op,
+	  { type_recursive, r },
+	  { type_end } }};
+
+	if(r->cnt >= r->n){
+		r->cnt = 0;
+		return;
+	}
+	data_draw(data, prm);
+	r->cnt++;
+	op_data_draw(&op, data, prm);
+}
+
 void
 op_data_draw(data_t *op, data_t *data, prm_t *prm)
 {
@@ -745,6 +763,10 @@
 		break;
 	case type_copy_timeshift_rot:
 		op_data_copy_timeshift_rot(op->p, data, prm);
+		break;
+
+	case type_recursive:
+		op_data_recursive(op->p, data, prm);
 		break;
 
 	case type_none:
diff -urN wf-/data.h wf/data.h
--- wf-/data.h	Wed Jan  6 00:00:00 2016
+++ wf/data.h	Fri Jan  8 00:00:00 2016
@@ -50,6 +50,8 @@
 #define type_copy_timeshift		204
 #define type_copy_timeshift_rot		205
 
+#define type_recursive			220
+
 #define type_test_conv			254
 
 
@@ -162,6 +164,11 @@
 	double init_sec, step_sec;
 	line_t l;
 	double init_deg, step_deg;
+};
+
+struct recursive{
+	data_t *op;
+	int n, cnt;
 };
 
 typedef struct{
diff -urN wf-/wf_ex.c wf/wf_ex.c
--- wf-/wf_ex.c	Thu Jan  7 00:00:00 2016
+++ wf/wf_ex.c	Fri Jan  8 00:00:00 2016
@@ -407,6 +407,20 @@
 		    { type_end } }},
 		  .data = &(data_t){ type_cube } }};
 
+		data_t *matryoshka = &(data_t){ type_op_data_set, &(struct op_data_set){
+		  .op = &(data_t){ type_arr, (data_t[]){
+		    { type_slide, &(d3_t){20,20,20} },
+		    { type_recursive, &(struct recursive){
+		      .op = &(data_t){ type_arr, (data_t[]){
+			{ type_zoom, &(d3_t)D3_ALL(0.8) },
+			{ type_rot_way, &(struct rot_way){.l=LINE_Z,.deg_way=WAY_V2(0,90, 3,3, 3) }},
+			{ type_end } }},
+		      .n=20, .cnt=0 }},
+		    { type_rdiv, &(struct rdiv){ .n=8, .rate=0.3 } },
+		    { type_zoom, &(d3_t)D3_ALL(20) },
+		    { type_end } }},
+		  .data = &(data_t){ type_octahedron } }};
+
 		data.type = type_arr;
 		data.p = (data_t[]){
 			*axyz,
@@ -417,6 +431,7 @@
 			*half_pipe,
 			*fireworks,
 			*train,
+			*matryoshka,
 			{ type_end }
 		};
 	}