diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9a69f10..7ab29b5 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -98,7 +98,9 @@ add_executable(unit_tests
         tests/CPU/Math/testOthersMath.cpp
         tests/testRectangleMemory.cpp
         tests/CPU/Math/testCMP.cpp
-        sources/PPU/Background.cpp sources/PPU/Background.hpp)
+        sources/PPU/Background.cpp
+        sources/PPU/Background.hpp
+        sources/PPU/PPUUtils.cpp)
 
 # include criterion & coverage
 target_link_libraries(unit_tests criterion -lgcov)
@@ -213,7 +215,9 @@ add_executable(ComSquare
         sources/Debugger/CGramDebug.cpp
         sources/Debugger/CGramDebug.hpp
         sources/Models/Vector2.hpp
-        sources/PPU/Background.cpp sources/PPU/Background.hpp sources/PPU/PPUUtils.cpp)
+        sources/PPU/Background.cpp
+        sources/PPU/Background.hpp
+        sources/PPU/PPUUtils.cpp)
 
 target_compile_definitions(ComSquare PUBLIC DEBUGGER_ENABLED)
 
diff --git a/sources/PPU/Background.cpp b/sources/PPU/Background.cpp
index dc50328..9ab26cb 100644
--- a/sources/PPU/Background.cpp
+++ b/sources/PPU/Background.cpp
@@ -5,6 +5,7 @@
 #include "PPUUtils.hpp"
 #include "PPU.hpp"
 #include "Background.hpp"
+#include "../Models/Vector2.hpp"
 
 namespace ComSquare::PPU
 {
@@ -72,6 +73,8 @@ namespace ComSquare::PPU
 			index = 0;
 			pos.x -= this->_characterSize.x;
 			pos.y++;
+			if (i == 7)
+				graphicAddress += 0x100 - this->_characterSize.x * this->_bpp;
 		}
 	}
 
@@ -103,9 +106,9 @@ namespace ComSquare::PPU
 		case 4:
 			secondHightByte =  this->_vram->read_internal((addr + 32) % VRAMSIZE);
 			secondLowByte = this->_vram->read_internal((addr + 33) %VRAMSIZE);
-			result = (((secondLowByte & (1U << (7U - nb))) + ((secondHightByte & (1U << (7U - nb))) << 1U)) << 2U) >> (7U - nb - 2);
+			result = ((secondHightByte & (1U << (7U - nb))) | ((secondLowByte & (1U << (7U - nb))) << 1U)) >> (7U - nb - 2);
 		case 2:
-			result += ((lowByte & (1U << (7U - nb))) + ((highByte & (1U << (7U - nb))) << 1U)) >> (7U - nb - 1);
+			result += ((highByte & (1U << (7U - nb))) | ((lowByte & (1U << (7U - nb))) << 1U)) >> (7U - nb);
 		default:
 			break;
 		}
@@ -137,5 +140,10 @@ namespace ComSquare::PPU
 		this->_TileMapStartAddress = address;
 	}
 
+	void Background::setCharacterSize(Vector2<int> size)
+	{
+		this->_characterSize = size;
+	}
+
 
 }
\ No newline at end of file
diff --git a/sources/PPU/Background.hpp b/sources/PPU/Background.hpp
index 719770f..32c94c4 100644
--- a/sources/PPU/Background.hpp
+++ b/sources/PPU/Background.hpp
@@ -48,6 +48,8 @@ namespace ComSquare::PPU
 		void renderBackground(void);
 		//! @brief Set the tilemap start address
 		void setTileMapStartAddress(uint16_t address);
+		//! @brief Set the character Size
+		void setCharacterSize(Vector2<int> size);
 	};
 }
 
diff --git a/sources/PPU/PPU.cpp b/sources/PPU/PPU.cpp
index 0c094cd..7179383 100644
--- a/sources/PPU/PPU.cpp
+++ b/sources/PPU/PPU.cpp
@@ -80,22 +80,16 @@ namespace ComSquare::PPU
 		for (int i = 0; vram_test[i] != -1; i++) {
 			this->vram->write_internal(i, vram_test[i]);
 		}
-	int vram_test_2[] = {8, 00, 02, 00, 0x0A, 00, 02, 00, 0x0A, 00, 00, 00, 00, 00, 00, -1};
-		for (int i = 0; vram_test[i] != -1; i++) {
+		int vram_test_2[] = {8, 00, 02, 00, 0x0A, 00, 02, 00, 0x0A, 00, 00, 00, 00, 00, 00, -1};
+		for (int i = 0; vram_test_2[i] != -1; i++) {
 			this->vram->write_internal(i + 0x8000, vram_test_2[i]);
 		}
-		for (int i = 0; vram_test[i] != -1; i++) {
-			this->vram->write_internal(i, vram_test[i]);
-		}
-		int vram_test_3[] = {8, 00, 02, 00, 0x0A, 00, 02, 00, 0x0A, 00, 00, 00, 00, 00, 00, -1};
-		for (int i = 0; vram_test[i] != -1; i++) {
+		int vram_test_3[] = {8, 00, 02, 00, 0x8, 00, 02, 00, 0x8, 00, 00, 00, 00, 00, 00, -1};
+		for (int i = 0; vram_test_3[i] != -1; i++) {
 			this->vram->write_internal(i + 0x8080, vram_test_3[i]);
 		}
-		for (int i = 0; vram_test[i] != -1; i++) {
-			this->vram->write_internal(i, vram_test[i]);
-		}
 		int vram_test_4[] = {8, 00, 02, 00, 0x0A, 00, 02, 00, 0x0A, 00, 00, 00, 00, 00, 00, -1};
-		for (int i = 0; vram_test[i] != -1; i++) {
+		for (int i = 0; vram_test_4[i] != -1; i++) {
 			this->vram->write_internal(i + 0x8100, vram_test_4[i]);
 		}
 		this->vram->write_internal(0x8040, 04);
@@ -125,6 +119,10 @@ namespace ComSquare::PPU
 
 		this->_registers._t[0].enableWindowDisplayBg1 = true;
 		this->_registers._t[0].enableWindowDisplayBg2 = true;
+		this->_backgrounds[0].setCharacterSize(this->getCharacterSize(1));
+		this->_backgrounds[1].setCharacterSize(this->getCharacterSize(1));
+		this->_backgrounds[2].setCharacterSize(this->getCharacterSize(2));
+		this->_backgrounds[3].setCharacterSize(this->getCharacterSize(2));
 	}
 
 	uint8_t PPU::read(uint24_t addr)
@@ -349,9 +347,11 @@ namespace ComSquare::PPU
 	{
 		(void)cycles;
 
-		this->renderMainAndSubScreen();
-		add_buffer(this->_screen, this->_subScreen);
-		add_buffer(this->_screen, this->_mainScreen);
+		//this->renderMainAndSubScreen();
+		//add_buffer(this->_screen, this->_subScreen);
+		//add_buffer(this->_screen, this->_mainScreen);
+		this->_backgrounds[0].renderBackground();
+		add_buffer(this->_screen, this->_backgrounds[0].buffer);
 		for (unsigned long i = 0; i < this->_screen.size(); i++) {
 			for (unsigned long j = 0; j < this->_screen[i].size(); j++) {
 				this->_renderer.putPixel(j, i, this->_screen[i][j]);
@@ -693,8 +693,6 @@ namespace ComSquare::PPU
 
 	void PPU::addToMainSubScreen(Background &bg)
 	{
-		int i = bg.bgNumber + bg.priority;
-
 		if (this->_registers._t[0].raw & (1U << (bg.bgNumber - 1U)))
 			this->add_buffer(this->_mainScreen, bg.buffer);
 		if (this->_registers._t[1].raw & (1U << (bg.bgNumber - 1U)))