diff --git a/Makefile b/Makefile
index 83acf0e..08d4b54 100644
--- a/Makefile
+++ b/Makefile
@@ -11,7 +11,7 @@ CFLAGS=-Wall -mmcu=$(MCU) -std=gnu99 -I $(TOOLCHAIN_PREFIX)/include -O1 -g0
 
 LDFLAGS=-mmcu=$(MCU) -L $(TOOLCHAIN_PREFIX)/include
 
-$(ARTIFACT).elf:	main.o led.o time.o PontCoopScheduler.o displayDriver.o canvas.o shapes.o shape_i.o shape_j.o shape_l.o shape_o.o shape_s.o shape_t.o shape_z.o
+$(ARTIFACT).elf:	main.o led.o time.o PontCoopScheduler.o displayDriver.o canvas.o shapes.o shape_i.o shape_j.o shape_l.o shape_o.o shape_s.o shape_t.o shape_z.o game.o
 	$(CC) -o $@ $(LDFLAGS) $^
 	$(OBJDUMP) -D $(ARTIFACT).elf > $(ARTIFACT).txt
 
diff --git a/game.c b/game.c
new file mode 100644
index 0000000..5894f69
--- /dev/null
+++ b/game.c
@@ -0,0 +1,67 @@
+#include "stddef.h"
+#include "stdint.h"
+
+#include "game.h"
+#include "PontCoopScheduler.h"
+#include "shapes.h"
+#include "canvas.h"
+
+
+typedef enum { e_idle, e_start, e_newStone, e_down, e_gameOver, e_delay } state_t;
+
+void gameExec(void *handle) {
+  static state_t state = e_start;
+  static uint8_t delay;
+
+  switch (state) {
+    case e_idle:
+      break;
+
+    case e_start:
+      canvasClear();
+      state = e_newStone;
+      break;
+
+    case e_newStone:
+      stoneCreate();
+      if (stoneDraw()) {
+        state = e_down;
+      } else {
+        state = e_gameOver;
+      }
+      break;
+      
+    case e_down:
+      if (! stoneMoveDown()) {
+        state = e_newStone;
+      }
+      break;
+
+    case e_gameOver:
+      for (uint8_t c = 0; c < canvas.width; c++) {
+        canvasSetPixel(c, 0, 0x0d);
+        canvasSetPixel(c, canvas.height-1, 0x0d);
+      }
+      for (uint8_t r = 0; r < canvas.height; r++) {
+        canvasSetPixel(0, r, 0x0d);
+        canvasSetPixel(canvas.width-1, r, 0x0d);
+      }
+      delay = 10;
+      state = e_delay;
+      break;
+
+    case e_delay:
+      delay--;
+      if (delay == 0) {
+        state = e_start;
+      }
+      break;
+  }
+
+  canvasShow();
+}
+
+void gameInit() {
+  schAdd(gameExec, NULL, 0, 1000);
+}
+
diff --git a/game.h b/game.h
new file mode 100644
index 0000000..a474984
--- /dev/null
+++ b/game.h
@@ -0,0 +1,7 @@
+#ifndef _GAME_H_
+#define _GAME_H_
+
+void gameInit();
+
+
+#endif // _GAME_H_
diff --git a/main.c b/main.c
index 101ddeb..9116076 100644
--- a/main.c
+++ b/main.c
@@ -8,7 +8,7 @@
 #include "led.h"
 #include "displayDriver.h"
 #include "canvas.h"
-#include "shapes.h"
+#include "game.h"
 
 
 int main() {
@@ -29,7 +29,7 @@ int main() {
     displayDriverInit();
     canvasInit();
 
-    shapesInit();
+    gameInit();
 
     __enable_interrupt();
 
diff --git a/shape_i.c b/shape_i.c
index 5e65414..ed4d346 100644
--- a/shape_i.c
+++ b/shape_i.c
@@ -1,26 +1,31 @@
 #include "shapes.h"
 #include "shape_i.h"
+#include "canvas.h"
 
 uint8_t draw_i() {
-  return 0;
+  canvasSetPixel(stone.x, stone.y, 0x01);
+  canvasSetPixel(stone.x, stone.y+1, 0x01);
+  canvasSetPixel(stone.x, stone.y+2, 0x01);
+  canvasSetPixel(stone.x, stone.y+3, 0x01);
+  return 1;
 }
 
 uint8_t moveDown_i() {
-  return 0;
+  return 1;
 }
 
 uint8_t moveLeft_i() {
-  return 0;
+  return 1;
 }
 
 uint8_t moveRight_i() {
-  return 0;
+  return 1;
 }
 
 uint8_t rotateLeft_i() {
-  return 0;
+  return 1;
 }
 
 uint8_t rotateRight_i() {
-  return 0;
+  return 1;
 }
diff --git a/shapes.c b/shapes.c
index bf396ee..f5b0bd8 100644
--- a/shapes.c
+++ b/shapes.c
@@ -11,15 +11,6 @@
 #include "shape_j.h"
 
 
-typedef enum { e_I=0, e_O, e_T, e_Z, e_S, e_L, e_J, e_ShapeEnd } shape_t;
-typedef enum { e_0, e_90, e_180, e_270 } orientation_t;
-
-typedef struct {
-  shape_t shape;
-  orientation_t orientation;
-  uint8_t x; // column
-  uint8_t y; // row
-} stone_t;
 
 typedef struct {
   uint8_t (* draw)();
@@ -42,37 +33,38 @@ const stoneOperations_t stoneOperations[] = {
 
 stone_t stone;
 
-uint8_t draw() {
+void stoneCreate() {
+  stone.shape = e_I;
+  stone.orientation = e_0;
+  stone.x = 5;
+  stone.y = 0;
+}
+
+// all of them return 1 in case of success and 0 in case of error
+uint8_t stoneDraw() {
   return stoneOperations[stone.shape].draw();
 }
 
-uint8_t moveDown() {
+uint8_t stoneMoveDown() {
   return stoneOperations[stone.shape].moveDown();
 }
 
-uint8_t moveLeft() {
+uint8_t stoneMoveLeft() {
   return stoneOperations[stone.shape].moveLeft();
 }
 
-uint8_t moveRight() {
+uint8_t stoneMoveRight() {
   return stoneOperations[stone.shape].moveRight();
 }
 
-uint8_t rotateLeft() {
+uint8_t stoneRotateLeft() {
   return stoneOperations[stone.shape].rotateLeft();
 }
 
-uint8_t rotateRight() {
+uint8_t stoneRotateRight() {
   return stoneOperations[stone.shape].rotateRight();
 }
 
-void shapesExec(void *handle) {
-  draw();
-}
-
-void shapesInit() {
-  shapesExec(NULL);
-}
 
 
 
diff --git a/shapes.h b/shapes.h
index 1861010..bc1dbd0 100644
--- a/shapes.h
+++ b/shapes.h
@@ -1,11 +1,28 @@
 #ifndef _SHAPES_H_
 #define _SHAPES_H_
 
+#include <stdint.h>
+
+void stoneCreate();
+uint8_t stoneDraw();
+uint8_t stoneMoveDown();
+uint8_t stoneMoveLeft();
+uint8_t stoneMoveRight();
+uint8_t stoneRotateLeft();
+uint8_t stoneRotateRight();
 
 
-void shapesInit();
-void shapesExec(void *handle);
+typedef enum { e_I=0, e_O, e_T, e_Z, e_S, e_L, e_J, e_ShapeEnd } shape_t;
+typedef enum { e_0, e_90, e_180, e_270 } orientation_t;
+
+typedef struct {
+  shape_t shape;
+  orientation_t orientation;
+  uint8_t x; // column
+  uint8_t y; // row
+} stone_t;
 
 
+extern stone_t stone;
 
 #endif // _SHAPES_H_