diff --git a/semestralka1/src/background_dark_inverted.h b/semestralka1/src/assets/background_frame.h
similarity index 99%
rename from semestralka1/src/background_dark_inverted.h
rename to semestralka1/src/assets/background_frame.h
index fe01584..606c590 100644
--- a/semestralka1/src/background_dark_inverted.h
+++ b/semestralka1/src/assets/background_frame.h
@@ -1,4 +1,4 @@
-// background_dark_inverted.h
+// src/assets/background_frame.h
 #pragma once
 
 static const char *BACKGROUND_MASK[] = {
diff --git a/semestralka1/src/render/player_mask.h b/semestralka1/src/assets/character_frames.h
similarity index 97%
rename from semestralka1/src/render/player_mask.h
rename to semestralka1/src/assets/character_frames.h
index 9e521c7..f5f6824 100644
--- a/semestralka1/src/render/player_mask.h
+++ b/semestralka1/src/assets/character_frames.h
@@ -1,4 +1,4 @@
-// src/render/player_mask.h
+// src/assets/character_frames.h
 
 #pragma once
 
diff --git a/semestralka1/src/game/state.cpp b/semestralka1/src/game/state.cpp
new file mode 100644
index 0000000..6ad3829
--- /dev/null
+++ b/semestralka1/src/game/state.cpp
@@ -0,0 +1,38 @@
+// src/game/state.cpp
+#include "state.h"
+
+void WalkingState::update() {
+  // stop crawling after duration
+  if (current_state == PlayerState::Crawl1 &&
+      state_timer.elapsed_time() >= CRAWL_DURATION) {
+    current_state = PlayerState::Walk1;
+    state_timer.stop();
+  }
+}
+
+void WalkingState::start_crawl() {
+  current_state = PlayerState::Crawl1;
+  state_timer.reset();
+  state_timer.start();
+}
+
+void WalkingState::toggle_walk_frame() {
+  if (current_state == PlayerState::Walk1) {
+    current_state = PlayerState::Walk2;
+  } else if (current_state == PlayerState::Walk2) {
+    current_state = PlayerState::Walk1;
+  }
+}
+
+CharacterFrame WalkingState::get_character_frame() const {
+  switch (current_state) {
+  case PlayerState::Walk1:
+    return CharacterFrame::Walk1;
+  case PlayerState::Walk2:
+    return CharacterFrame::Walk2;
+  case PlayerState::Crawl1:
+    return CharacterFrame::Crawl1;
+  default:
+    return CharacterFrame::Walk1;
+  }
+}
diff --git a/semestralka1/src/game/state.h b/semestralka1/src/game/state.h
new file mode 100644
index 0000000..850b324
--- /dev/null
+++ b/semestralka1/src/game/state.h
@@ -0,0 +1,26 @@
+// src/game/state.h
+#pragma once
+#include "mbed.h"
+#include "../assets/character_frames.h"
+
+constexpr auto CRAWL_DURATION = 300ms;
+
+enum class PlayerState { Walk1, Walk2, Crawl1 };
+
+class WalkingState {
+private:
+  PlayerState current_state = PlayerState::Walk1;
+  Timer state_timer;
+
+public:
+  // Update state (handles crawl timeout)
+  void update();
+  
+  // State transitions
+  void start_crawl();
+  void toggle_walk_frame();
+  
+  // Getters
+  PlayerState get_state() const { return current_state; }
+  CharacterFrame get_character_frame() const;
+};
diff --git a/semestralka1/src/main.cpp b/semestralka1/src/main.cpp
index ee16c71..9224c69 100644
--- a/semestralka1/src/main.cpp
+++ b/semestralka1/src/main.cpp
@@ -1,7 +1,7 @@
 // main.cpp
 
 #include "mbed.h"
-#include "background_dark_inverted.h"
+#include "assets/background_frame.h"
 #include "render/loop.h"
 
 #define TARGET_TX_PIN USBTX
diff --git a/semestralka1/src/render/background.cpp b/semestralka1/src/render/background.cpp
index fa6f150..c73c55c 100644
--- a/semestralka1/src/render/background.cpp
+++ b/semestralka1/src/render/background.cpp
@@ -1,6 +1,6 @@
 // src/render/background.cpp
 
-#include "../background_dark_inverted.h"
+#include "../assets/background_frame.h"
 #include <cstdio>
 #include <cstring>
 
diff --git a/semestralka1/src/render/loop.cpp b/semestralka1/src/render/loop.cpp
index 5385464..b3d4ffe 100644
--- a/semestralka1/src/render/loop.cpp
+++ b/semestralka1/src/render/loop.cpp
@@ -1,11 +1,11 @@
 // src/render/loop.cpp
 #include "loop.h"
-#include "../background_dark_inverted.h"
+#include "../assets/background_frame.h"
 #include "player_positioning.h"
 #include "background.h"
 #include "mbed.h"
 #include "player.h"
-#include "player_mask.h"
+#include "../assets/character_frames.h"
 #include <cstring>
 
 extern BufferedSerial serial_port;
diff --git a/semestralka1/src/render/player.cpp b/semestralka1/src/render/player.cpp
index ea7ec42..4450a0a 100644
--- a/semestralka1/src/render/player.cpp
+++ b/semestralka1/src/render/player.cpp
@@ -1,6 +1,6 @@
 // src/render/player.cpp
 #include "player.h"
-#include "player_mask.h"
+#include "../assets/character_frames.h"
 #include <cstdio>
 
 void draw_character(int x, int y, CharacterFrame frame) {
diff --git a/semestralka1/src/render/player.h b/semestralka1/src/render/player.h
index 7785ed1..9804392 100644
--- a/semestralka1/src/render/player.h
+++ b/semestralka1/src/render/player.h
@@ -1,6 +1,6 @@
 // src/render/player.h
 #pragma once
-#include "player_mask.h"
+#include "../assets/character_frames.h"
 
 // Draw the player object starting at given (x, y)
 void draw_character(int x, int y, CharacterFrame frame);
diff --git a/semestralka1/src/render/player_positioning.cpp b/semestralka1/src/render/player_positioning.cpp
index ec382e3..4c42a1a 100644
--- a/semestralka1/src/render/player_positioning.cpp
+++ b/semestralka1/src/render/player_positioning.cpp
@@ -1,6 +1,6 @@
 // src/render/player_positioning.cpp
 #include "player_positioning.h"
-#include "../background_dark_inverted.h"
+#include "../assets/background_frame.h"
 #include <cstdio>
 
 // Convert a pivot coordinate (bottom-left) to the top-left draw position
diff --git a/semestralka1/src/render/player_positioning.h b/semestralka1/src/render/player_positioning.h
index 13ad894..376e933 100644
--- a/semestralka1/src/render/player_positioning.h
+++ b/semestralka1/src/render/player_positioning.h
@@ -1,7 +1,7 @@
 // src/render/player_positioning.h
 #pragma once
-#include "../background_dark_inverted.h"
-#include "player_mask.h"
+#include "../assets/background_frame.h"
+#include "../assets/character_frames.h"
 
 struct CharacterPosition {
     int x;