diff --git a/source/code/global.hpp b/source/code/global.hpp
index d0874cd..4a1a102 100644
--- a/source/code/global.hpp
+++ b/source/code/global.hpp
@@ -32,6 +32,7 @@ http://www.blockattack.net
 #include "ExplosionManager.hpp"
 #include "sago/SagoTextField.hpp"
 #include "ModInfo.hpp"
+#include "themes.hpp"
 
 //if SHAREDIR is not used we look in current directory
 #ifndef SHAREDIR
@@ -72,9 +73,6 @@ const int SCREEN_HIGHT = 768;
 const int BOARD_WIDTH = 300;
 const int BOARD_HEIGHT = 600;
 
-struct Theme {
-	std::string back_board = "back_board";  // Can also be "back_board_sample_snow" or "trans_cover"
-};
 
 struct GlobalData {
 	sago::SagoSprite bHighScore;
diff --git a/source/code/main.cpp b/source/code/main.cpp
index d97d760..2cbd294 100644
--- a/source/code/main.cpp
+++ b/source/code/main.cpp
@@ -1529,6 +1529,7 @@ int runGame(Gametype gametype, int level) {
 						if ( event.key.keysym.sym == SDLK_F5 ) {
 						}
 						if ( event.key.keysym.sym == SDLK_F11 ) {
+							globalData.theme = getNextTheme();
 						} //F11
 					}
 					if ( event.key.keysym.sym == SDLK_F12 ) {
diff --git a/source/code/themes.cpp b/source/code/themes.cpp
new file mode 100644
index 0000000..999da72
--- /dev/null
+++ b/source/code/themes.cpp
@@ -0,0 +1,49 @@
+/*
+===========================================================================
+blockattack - Block Attack - Rise of the Blocks
+Copyright (C) 2005-2023 Poul Sander
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see http://www.gnu.org/licenses/
+
+Source information and contacts persons can be found at
+https://www.blockattack.net
+===========================================================================
+*/
+
+
+#include "themes.hpp"
+
+#include <vector>
+
+static std::vector<Theme> themes(1);
+static bool initialized = false;
+static size_t current_theme = 0;
+
+void InitThemes() {
+	if (initialized) {
+		return;
+	}
+	themes.resize(1);  //Add the default theme
+	Theme snow;
+	snow.theme_name = "snow";
+	snow.back_board = "back_board_sample_snow";
+	themes.push_back(snow);
+}
+
+Theme getNextTheme() {
+	InitThemes();
+	current_theme++;
+	current_theme = current_theme % themes.size();
+	return themes.at(current_theme);
+}
diff --git a/source/code/themes.hpp b/source/code/themes.hpp
new file mode 100644
index 0000000..7a5db3c
--- /dev/null
+++ b/source/code/themes.hpp
@@ -0,0 +1,37 @@
+/*
+===========================================================================
+blockattack - Block Attack - Rise of the Blocks
+Copyright (C) 2005-2023 Poul Sander
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see http://www.gnu.org/licenses/
+
+Source information and contacts persons can be found at
+https://www.blockattack.net
+===========================================================================
+*/
+
+#pragma once
+
+#include <string>
+
+struct Theme {
+	std::string theme_name = "standard";
+	std::string back_board = "back_board";  // Can also be "back_board_sample_snow" or "trans_cover"
+};
+
+/**
+ * @brief returns a theme from a list
+ * @return A copy of a theme
+ */
+Theme getNextTheme();