diff --git a/Makefile b/Makefile
index 198f109..6967431 100644
--- a/Makefile
+++ b/Makefile
@@ -10,6 +10,7 @@ SRCS= \
 	$(SRC_DIR)effects/random.cpp \
 	$(SRC_DIR)effects/wood.cpp \
 	$(SRC_DIR)effects/mountain.cpp \
+	$(SRC_DIR)effects/debug.cpp \
 
 MAKEFLAGS += --no-print-directory
 
diff --git a/srcs/effects/cloud.cpp b/srcs/effects/cloud.cpp
index 26ecad1..f76924e 100644
--- a/srcs/effects/cloud.cpp
+++ b/srcs/effects/cloud.cpp
@@ -3,10 +3,7 @@
 #include "window.hpp"
 #include "noise/perlin.hpp"
 
-int cloud(uint32_t *img, bool &needUpdate) {
-	if (!needUpdate)
-		return 0;
-	needUpdate = false;
+int cloud(uint32_t *img) {
 	static PerlinNoise PerlinNoise;
 	static float time = 0.0;
 	for (int y = 0; y < HEIGHT; y++) {
@@ -19,7 +16,6 @@ int cloud(uint32_t *img, bool &needUpdate) {
 		}
 	}
 	time += 0.1;
-	needUpdate = true;
 	return 0;
 }
 
diff --git a/srcs/effects/debug.cpp b/srcs/effects/debug.cpp
new file mode 100644
index 0000000..685eee2
--- /dev/null
+++ b/srcs/effects/debug.cpp
@@ -0,0 +1,18 @@
+#include <cmath>
+#include <cstdint>
+#include "window.hpp"
+#include "noise/perlin.hpp"
+
+int test(uint32_t *img) {
+	static bool a = true;
+	for (int y = 0; y < HEIGHT; y++) {
+		for (int x = 0; x < WIDTH; x++) {
+			if (a)
+				img[y * WIDTH + x] = 0x202020;
+			else
+				img[y * WIDTH + x] = 0x0;
+		}
+	}
+	a = !a;
+	return 0;
+}
\ No newline at end of file
diff --git a/srcs/effects/graph.cpp b/srcs/effects/graph.cpp
index 9a704a8..605f467 100644
--- a/srcs/effects/graph.cpp
+++ b/srcs/effects/graph.cpp
@@ -3,10 +3,7 @@
 #include "window.hpp"
 #include "noise/perlin.hpp"
 
-int graph(uint32_t *img, bool &needUpdate) {
-	if (!needUpdate)
-		return 0;
-	needUpdate = false;
+int graph(uint32_t *img) {
 	static PerlinNoise PerlinNoise;
 	static float time = 0.0;
 	for (int x = 0; x < WIDTH; x++) {
@@ -21,14 +18,10 @@ int graph(uint32_t *img, bool &needUpdate) {
 		}
 	}
 	time += 0.001;
-	needUpdate = true;
 	return 0;
 }
 
-int graph2(uint32_t *img, bool &needUpdate) {
-	if (!needUpdate)
-		return 0;
-	needUpdate = false;
+int graph2(uint32_t *img) {
 	static PerlinNoise PerlinNoise;
 	static float time = 0.0;
 	for (int x = 0; x < WIDTH; x++) {
@@ -45,6 +38,5 @@ int graph2(uint32_t *img, bool &needUpdate) {
 		}
 	}
 	time += 0.001;
-	needUpdate = true;
 	return 0;
 }
diff --git a/srcs/effects/marble.cpp b/srcs/effects/marble.cpp
index 5f0bb90..5ebe23f 100644
--- a/srcs/effects/marble.cpp
+++ b/srcs/effects/marble.cpp
@@ -3,10 +3,7 @@
 #include "window.hpp"
 #include "noise/perlin.hpp"
 
-int marble(uint32_t *img, bool &needUpdate) {
-	if (!needUpdate)
-		return 0;
-	needUpdate = false;
+int marble(uint32_t *img) {
 	static PerlinNoise perlinNoise;
 	static float time = 0.0;
 	for (int y = 0; y < HEIGHT; y++) {
@@ -18,7 +15,6 @@ int marble(uint32_t *img, bool &needUpdate) {
 		}
 	}
 	time += 0.01;
-	needUpdate = true;
 	return 0;
 }
 
diff --git a/srcs/effects/mountain.cpp b/srcs/effects/mountain.cpp
index 056d09b..10fc502 100644
--- a/srcs/effects/mountain.cpp
+++ b/srcs/effects/mountain.cpp
@@ -3,10 +3,7 @@
 #include "window.hpp"
 #include "noise/perlin.hpp"
 
-int mountain(uint32_t *img, bool &needUpdate) {
-	if (!needUpdate)
-		return 0;
-	needUpdate = false;
+int mountain(uint32_t *img) {
 	static PerlinNoise P(9);
 	static PerlinNoise P2(1000);
 	static PerlinNoise P3(500);
@@ -34,9 +31,6 @@ int mountain(uint32_t *img, bool &needUpdate) {
 			img[i * WIDTH + x] = 0x151515;
 		}
 	}
-
-
 	time += 0.03;
-	needUpdate = true;
 	return 0;
 }
diff --git a/srcs/effects/random.cpp b/srcs/effects/random.cpp
index 7700633..5bc2414 100644
--- a/srcs/effects/random.cpp
+++ b/srcs/effects/random.cpp
@@ -2,10 +2,7 @@
 #include "window.hpp"
 #include "noise/perlin.hpp"
 
-int random(uint32_t *img, bool &needUpdate) {
-	if (!needUpdate)
-		return 0;
-	needUpdate = false;
+int random(uint32_t *img) {
 	static PerlinNoise PerlinNoise;
 	static float time = 0.0;
 	for (int y = 0; y < HEIGHT; y++) {
@@ -17,7 +14,6 @@ int random(uint32_t *img, bool &needUpdate) {
 		}
 	}
 	time += 0.01;
-	needUpdate = true;
 	return 0;
 }
 
diff --git a/srcs/effects/wood.cpp b/srcs/effects/wood.cpp
index 115bba0..1374113 100644
--- a/srcs/effects/wood.cpp
+++ b/srcs/effects/wood.cpp
@@ -3,10 +3,7 @@
 #include "window.hpp"
 #include "noise/perlin.hpp"
 
-int wood(uint32_t *img, bool &needUpdate) {
-	if (!needUpdate)
-		return 0;
-	needUpdate = false;
+int wood(uint32_t *img) {
 	static PerlinNoise perlinNoise;
 	static float time = 0.0;
 	for (int y = 0; y < HEIGHT; y++) {
@@ -18,6 +15,5 @@ int wood(uint32_t *img, bool &needUpdate) {
 		}
 	}
 	time += 0.01;
-	needUpdate = true;
 	return 0;
 }
diff --git a/srcs/main.cpp b/srcs/main.cpp
index f3c59e5..4b649dc 100644
--- a/srcs/main.cpp
+++ b/srcs/main.cpp
@@ -4,14 +4,14 @@
 
 
 int main() {
-	WindowManager window(WIDTH, HEIGHT, mountain);
+	WindowManager window(WIDTH, HEIGHT, test);
 	window.load_render(graph);
 	window.load_render(graph2);
 	window.load_render(cloud);
 	window.load_render(marble);
 	window.load_render(random);
 	window.load_render(wood);
-
+	window.load_render(mountain);
 
 	window.loop();
 	return 0;
diff --git a/srcs/windowManager/WindowManager.cpp b/srcs/windowManager/WindowManager.cpp
index 4fc08a2..22efc88 100644
--- a/srcs/windowManager/WindowManager.cpp
+++ b/srcs/windowManager/WindowManager.cpp
@@ -5,7 +5,7 @@
 #include <X11/Xlib.h>
 #include <csignal>
 
-WindowManager::WindowManager(int width, int height, int (*render)(u_int32_t *img, bool &needUpdate)) :
+WindowManager::WindowManager(int width, int height, int (*render)(u_int32_t *img)) :
 	render(render),
 	ptrTabIndex(0),
 	WindowX(0), WindowY(0),
@@ -15,8 +15,7 @@ WindowManager::WindowManager(int width, int height, int (*render)(u_int32_t *img
 	WindowClass(CopyFromParent),
 	WindowVisual(CopyFromParent),
 	AttributeValueMask(CWBackPixel | CWEventMask),
-	isDisplayReady(false),
-	needUpdate(true)
+	isDisplayReady(false)
 {
 	img = new u_int32_t[width * height];
 	MainDisplay = XOpenDisplay(0);
@@ -81,10 +80,8 @@ void WindowManager::loop() {
 			handle_events(GeneralEvent);
 		}
 		if (isDisplayReady) {
-			if (this->needUpdate) {
-				update_image(this->render);
-				display_image();
-			}
+			update_image(this->render);
+			display_image();
 			// XSync(this->MainDisplay, false);
 		}
 	}
@@ -112,11 +109,11 @@ void WindowManager::display_image() {
 	XFlush(MainDisplay);
 }
 
-void WindowManager::update_image(int (*func)(u_int32_t *img, bool &needUpdate)) {
-	if (func(this->img, this->needUpdate))
+void WindowManager::update_image(int (*func)(u_int32_t *img)) {
+	if (func(this->img))
 		this->isWindowOpen = false;
 }
 
-void WindowManager::load_render(int (*func)(u_int32_t *img, bool &needUpdate)) {
+void WindowManager::load_render(int (*func)(u_int32_t *img)) {
 	this->renderFunctions.push_back(func);
 }
\ No newline at end of file