diff --git a/Makefile b/Makefile
index 86ced9c..89e4d3f 100644
--- a/Makefile
+++ b/Makefile
@@ -14,7 +14,7 @@ OBJ = \
 CFLAGS = \
 	-I./ext/cglm/include  \
 	-I./ext/glfw/include  \
-	-Wall -Wno-unused-function -std=c99 -D_POSIX_C_SOURCE \
+	-Wall -Wno-unused-function -std=c99 -D_GNU_SOURCE \
 
 WAYLAND-LIB = \
 	xdg-shell \
@@ -48,6 +48,8 @@ windows: $(OBJ) glfw.dll
 glfw.dll:
 	$(CC) -fPIC -shared -D_GLFW_WIN32 -D_GLFW_BUILD_DLL ./ext/glfw/src/*.c -o $@ -lgdi32 
 
+src/main.o: src/data/shaders.h src/data/axis.h
+
 # LINUX
 linux-wayland: $(OBJ)
 	for i in $(WAYLAND-LIB); \
@@ -79,4 +81,5 @@ clean:
 .SUFFIXES: .c .o 
 
 .c.o: src/main.h
+	clang-format -i $<
 	$(CC) $(CFLAGS) -c -o $@ $<
diff --git a/src/context.c b/src/context.c
index e289e38..39c2169 100644
--- a/src/context.c
+++ b/src/context.c
@@ -1,7 +1,7 @@
 #include "main.h"
 #ifdef GLAD
-#include <glad.h>
 #include <GLFW/glfw3.h>
+#include <glad.h>
 #else
 #include <GL/glew.h>
 #endif
@@ -19,9 +19,8 @@ int init_context(void)
 
 	return gladLoadGLLoader((GLADloadproc)glfwGetProcAddress);
 #else
-	return glewInit() == GLEW_OK; 
+	return glewInit();
 #endif
-
 }
 
 void clean_context(void) { glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); }
diff --git a/src/data/shaders.h b/src/data/shaders.h
index 03cdc2c..1f058ce 100644
--- a/src/data/shaders.h
+++ b/src/data/shaders.h
@@ -46,27 +46,32 @@ const char * fs_plain =
 	"	FragColor = texture( palette, vec3( 0, 0, index ) ).rgba;"
 	"}";
 
-	
 const char * fs =
-	"#version 330 core\n"
+    "#version 330 core\n"
 
-	"uniform sampler2DArray palette;"
+    "uniform sampler2DArray palette;"
 
-	"in float index;"
-	"out vec4 FragColor;"
-	"in vec3 Normal;"
-	"in vec3 FragPos;"
+    "in float index;"
+    "in vec3 Normal;"
+    "in vec3 FragPos;"
 
-	"void main()"
-	"{"
+    "out vec4 FragColor;"
 
-	"	vec4 color = texture( palette, vec3( 0, 0, index ) ).rgba;"
-	"	vec3 lightPos = vec3(0,0,-15);"
-	"	vec3 lightDir = normalize(lightPos - FragPos);"
+    "void main()"
+    "{"
+    "   vec4 color = texture(palette, vec3(0, 0, index));\n"
 
-	"	float diffuse = abs(dot(Normal, lightDir)); "
+    "   vec3 viewPos = vec3(0, 0, -15);\n"
+    "   vec3 viewDir = normalize(viewPos - FragPos);\n"
 
-	"	FragColor = (0.5 + 0.5*diffuse)*color;"
-	"}";
+    "   vec3 lightPos = viewPos;\n"
+    "   vec3 lightDir = normalize(lightPos - FragPos);\n"
 
-	
+    "   vec3 halfwayDir = normalize(lightDir + viewDir);\n"
+
+    "   float specular = pow(max(dot(normalize(Normal), halfwayDir), 0.0), 16.0);\n"
+    "   float diffuse = max(dot(normalize(Normal), lightDir), 0.0);\n"
+
+    "   vec3 result = (0.5 + 0.5 * diffuse + specular) * color.rgb;\n"
+    "   FragColor = vec4(result, color.a);\n"
+    "}";
diff --git a/src/main.c b/src/main.c
old mode 100644
new mode 100755
diff --git a/src/mesh.c b/src/mesh.c
index a19931e..100be67 100644
--- a/src/mesh.c
+++ b/src/mesh.c
@@ -68,8 +68,8 @@ mesh_t create_mesh(float *d, float *n, unsigned char m)
 	{
 		glGenBuffers(1, &p->n_vbo);
 		glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, p->n_vbo);
-		glBufferData(GL_ELEMENT_ARRAY_BUFFER, p->vertex * m * sizeof(float), n + 1,
-			GL_STATIC_DRAW);
+		glBufferData(GL_ELEMENT_ARRAY_BUFFER, p->vertex * m * sizeof(float),
+			n + 1, GL_STATIC_DRAW);
 	}
 
 	for (i = 0; i < 4; ++i)