diff --git a/README.md b/README.md
index 665385f..e12d60b 100644
--- a/README.md
+++ b/README.md
@@ -106,7 +106,7 @@ make -f Makefile.dev release-arch
   - [ ] 16 input + 16 fx definition and selection (with const param)
   - [x] Feedback texture
   - [ ] Shaders config file
-    - [ ] uniform config
+    - [x] uniform config
     - [ ] fragment output config
     - [ ] subroutines config
   - [ ] Clean code
diff --git a/src/config.h b/src/config.h
index dc65c9a..437c3fd 100644
--- a/src/config.h
+++ b/src/config.h
@@ -9,10 +9,6 @@
 #define VERSION "(dev)"
 #endif /* VERSION */
 
-#ifndef FRAG_COUNT
-#define FRAG_COUNT 6
-#endif /* FRAG_COUNT */
-
 #ifndef TEX_COUNT
 #define TEX_COUNT 9
 #endif /* TEXT_COUNT */
diff --git a/src/config_file.c b/src/config_file.c
index f0934cf..ddfb2f4 100644
--- a/src/config_file.c
+++ b/src/config_file.c
@@ -102,7 +102,8 @@ char *config_file_get_str(ConfigFile config, char *key, char *default_value) {
   return item->value;
 }
 
-int config_file_get_int(ConfigFile config, char *key, int default_value) {
+unsigned int config_file_get_int(ConfigFile config, char *key,
+                                 int default_value) {
   ConfigFileItem c_key;
   ConfigFileItem *item;
 
@@ -119,7 +120,7 @@ int config_file_get_int(ConfigFile config, char *key, int default_value) {
     return default_value;
   }
 
-  return atoi(item->value);
+  return (unsigned int)atoi(item->value);
 }
 
 void config_file_free(ConfigFile config) { hashmap_free(config.map); }
\ No newline at end of file
diff --git a/src/config_file.h b/src/config_file.h
index 7e15448..52a99b2 100644
--- a/src/config_file.h
+++ b/src/config_file.h
@@ -7,7 +7,8 @@ ConfigFile config_file_read(char *path, bool free_path);
 
 char *config_file_get_str(ConfigFile config, char *key, char *default_value);
 
-int config_file_get_int(ConfigFile config, char *key, int default_value);
+unsigned int config_file_get_int(ConfigFile config, char *key,
+                                 int default_value);
 
 void config_file_free(ConfigFile config);
 
diff --git a/src/forge.c b/src/forge.c
index 40e6741..ebdd089 100644
--- a/src/forge.c
+++ b/src/forge.c
@@ -53,7 +53,7 @@ static void hot_reload(ShaderProgram program, File *common_shader_code,
     force_update = true;
   }
 
-  for (i = 0; i < FRAG_COUNT; i++) {
+  for (i = 0; i < program.frag_count; i++) {
     if (force_update || file_should_update(fragment_shaders[i])) {
       file_update(&fragment_shaders[i]);
       file_prepend(&fragment_shaders[i], *common_shader_code);
@@ -96,10 +96,10 @@ File read_fragment_shader_file(char *frag_path, unsigned int i) {
 }
 
 static void init_files(char *frag_path, File *common_shader_code,
-                       File *fragment_shaders) {
+                       File *fragment_shaders, unsigned int frag_count) {
   unsigned int i;
 
-  for (i = 0; i < FRAG_COUNT + 1; i++) {
+  for (i = 0; i < frag_count + 1; i++) {
     if (i == 0) {
       (*common_shader_code) = read_fragment_shader_file(frag_path, i);
     } else {
@@ -110,10 +110,11 @@ static void init_files(char *frag_path, File *common_shader_code,
   }
 }
 
-static void free_files(File *common_shader_code, File *fragment_shaders) {
+static void free_files(File *common_shader_code, File *fragment_shaders,
+                       unsigned int frag_count) {
   unsigned int i;
 
-  for (i = 0; i < FRAG_COUNT; i++) {
+  for (i = 0; i < frag_count; i++) {
     file_free(&fragment_shaders[i], true);
   }
 
@@ -121,7 +122,8 @@ static void free_files(File *common_shader_code, File *fragment_shaders) {
 }
 
 void forge_run(Parameters params) {
-  File fragment_shaders[FRAG_COUNT];
+  unsigned int frag_count;
+  File *fragment_shaders;
   File common_shader_code;
   ShaderProgram program;
   Window *window;
@@ -129,10 +131,15 @@ void forge_run(Parameters params) {
   Context context;
   ConfigFile shader_config;
 
-  init_files(params.frag_path, &common_shader_code, fragment_shaders);
-
   shader_config = config_file_read(params.frag_config_path, false);
 
+  frag_count = config_file_get_int(shader_config, "FRAG_COUNT", 6);
+
+  fragment_shaders = malloc(frag_count * sizeof(File));
+
+  init_files(params.frag_path, &common_shader_code, fragment_shaders,
+             frag_count);
+
   window = window_init(PACKAGE " " VERSION, params.screen, error_callback,
                        key_callback);
 
@@ -152,9 +159,9 @@ void forge_run(Parameters params) {
          fragment_shaders, &timer);
   }
 
-  window_close(window, true);
-
-  free_files(&common_shader_code, fragment_shaders);
+  free_files(&common_shader_code, fragment_shaders, frag_count);
 
   config_file_free(shader_config);
+
+  window_close(window, true);
 }
\ No newline at end of file
diff --git a/src/shaders.c b/src/shaders.c
index dad6cfd..6b38210 100644
--- a/src/shaders.c
+++ b/src/shaders.c
@@ -1,8 +1,10 @@
 #include <glad/gl.h>
 #include <linmath.h>
 #include <stddef.h>
+#include <stdlib.h>
 
 #include "config.h"
+#include "config_file.h"
 #include "constants.h"
 #include "logs.h"
 #include "shaders.h"
@@ -59,9 +61,11 @@ static void init_textures(ShaderProgram *program, Context context) {
 static void init_framebuffers(ShaderProgram *program) {
   unsigned int i, j;
 
-  glGenFramebuffers(FRAG_COUNT, program->frame_buffers);
+  program->frame_buffers = malloc(program->frag_count * sizeof(GLuint));
 
-  for (i = 0; i < FRAG_COUNT; i++) {
+  glGenFramebuffers(program->frag_count, program->frame_buffers);
+
+  for (i = 0; i < program->frag_count; i++) {
     glBindFramebuffer(GL_FRAMEBUFFER, program->frame_buffers[i]);
 
     for (j = 0; j < TEX_COUNT; j++) {
@@ -118,8 +122,10 @@ static void init_shaders(ShaderProgram *program, File *fragment_shaders) {
                                     "internal fragment shader (monitor)",
                                     monitor_shader_text);
 
+  program->fragment_shaders = malloc(program->frag_count * sizeof(GLuint));
+
   // compile fragment shaders
-  for (i = 0; i < FRAG_COUNT; i++) {
+  for (i = 0; i < program->frag_count; i++) {
     program->fragment_shaders[i] = glCreateShader(GL_FRAGMENT_SHADER);
     program->error |=
         !compile_shader(program->fragment_shaders[i], fragment_shaders[i].path,
@@ -132,7 +138,7 @@ static void init_shaders(ShaderProgram *program, File *fragment_shaders) {
 }
 
 static void init_single_program(ShaderProgram *program, unsigned int i,
-                                bool output) {
+                                ConfigFile shader_config, bool output) {
   unsigned int j;
   char name[32];
 
@@ -150,14 +156,19 @@ static void init_single_program(ShaderProgram *program, unsigned int i,
 
   // create uniforms pointers
   if (!output) {
-    program->itime_locations[i] =
-        glGetUniformLocation(program->programs[i], "iTime");
-    program->itempo_locations[i] =
-        glGetUniformLocation(program->programs[i], "iTempo");
-    program->ifps_locations[i] =
-        glGetUniformLocation(program->programs[i], "iFPS");
-    program->ires_locations[i] =
-        glGetUniformLocation(program->programs[i], "iResolution");
+    program->itime_locations[i] = glGetUniformLocation(
+        program->programs[i],
+        config_file_get_str(shader_config, "UNIFORM_TIME", "iTime"));
+    program->itempo_locations[i] = glGetUniformLocation(
+        program->programs[i],
+        config_file_get_str(shader_config, "UNIFORM_TEMPO", "iTempo"));
+    program->ifps_locations[i] = glGetUniformLocation(
+        program->programs[i],
+        config_file_get_str(shader_config, "UNIFORM_FPS", "iFPS"));
+    program->ires_locations[i] = glGetUniformLocation(
+        program->programs[i],
+        config_file_get_str(shader_config, "UNIFORM_RESOLUTION",
+                            "iResolution"));
 
     for (j = 0; j < SUB_COUNT; j++) {
       sprintf(name, "src_%d", j + 1);
@@ -177,7 +188,7 @@ static void init_single_program(ShaderProgram *program, unsigned int i,
   // create texX uniforms pointer
   for (j = 0; j < TEX_COUNT; j++) {
     sprintf(name, "tex%d", j);
-    program->textures_locations[i][j] =
+    program->textures_locations[j][i] =
         glGetUniformLocation(program->programs[i], name);
   }
 
@@ -194,6 +205,26 @@ static void init_single_program(ShaderProgram *program, unsigned int i,
   log_success("Program %d initialized", i + 1);
 }
 
+static void init_programs(ShaderProgram *program, ConfigFile shader_config) {
+  unsigned int i;
+
+  program->programs = malloc(program->frag_count * sizeof(GLuint));
+  program->itime_locations = malloc(program->frag_count * sizeof(GLuint));
+  program->itempo_locations = malloc(program->frag_count * sizeof(GLuint));
+  program->ifps_locations = malloc(program->frag_count * sizeof(GLuint));
+  program->ires_locations = malloc(program->frag_count * sizeof(GLuint));
+  program->vpos_locations = malloc(program->frag_count * sizeof(GLuint));
+
+  for (i = 0; i < TEX_COUNT; i++) {
+    program->textures_locations[i] =
+        malloc(program->frag_count * sizeof(GLuint));
+  }
+
+  for (i = 0; i < program->frag_count + 1; i++) {
+    init_single_program(program, i, shader_config, i == program->frag_count);
+  }
+}
+
 ShaderProgram shaders_init(File *fragment_shaders, ConfigFile shader_config,
                            Context context) {
   unsigned int i;
@@ -202,6 +233,7 @@ ShaderProgram shaders_init(File *fragment_shaders, ConfigFile shader_config,
   program.error = false;
   program.last_width = context.width;
   program.last_height = context.height;
+  program.frag_count = config_file_get_int(shader_config, "FRAG_COUNT", 6);
 
   init_textures(&program, context);
 
@@ -215,11 +247,9 @@ ShaderProgram shaders_init(File *fragment_shaders, ConfigFile shader_config,
 
   init_vertices(&program);
 
-  // create and link full shader programs
-  for (i = 0; i < FRAG_COUNT + 1; i++) {
-    init_single_program(&program, i, i == FRAG_COUNT);
-  }
+  init_programs(&program, shader_config);
 
+  // TODO each for each frag
   for (i = 0; i < TEX_COUNT; i++) {
     program.draw_buffers[i] = GL_COLOR_ATTACHMENT0 + i;
   }
@@ -263,11 +293,11 @@ void shaders_apply(ShaderProgram program, Context context) {
   resolution[0] = (float)context.width;
   resolution[1] = (float)context.height;
 
-  for (i = 0; i < FRAG_COUNT + 1; i++) {
+  for (i = 0; i < program.frag_count + 1; i++) {
     // use specific shader program
     glUseProgram(program.programs[i]);
 
-    if (i == FRAG_COUNT) {
+    if (i == program.frag_count) {
       // use default framebuffer (output)
       glBindFramebuffer(GL_FRAMEBUFFER, 0);
 
@@ -294,7 +324,7 @@ void shaders_apply(ShaderProgram program, Context context) {
 
     // set GL_TEXTURE(X) to uniform sampler2D texX
     for (j = 0; j < TEX_COUNT; j++) {
-      glUniform1i(program.textures_locations[i][j], j);
+      glUniform1i(program.textures_locations[j][i], j);
     }
 
     glDrawBuffers(TEX_COUNT - 1, program.draw_buffers);
@@ -302,4 +332,4 @@ void shaders_apply(ShaderProgram program, Context context) {
     // draw output
     glDrawArrays(GL_TRIANGLES, 0, 6);
   }
-}
\ No newline at end of file
+}
diff --git a/src/types.h b/src/types.h
index e1a1c28..962099e 100644
--- a/src/types.h
+++ b/src/types.h
@@ -35,31 +35,33 @@ typedef struct ShaderProgram {
   int last_width;
   int last_height;
 
-  GLuint programs[FRAG_COUNT + 1];
+  unsigned int frag_count;
+
+  GLuint *programs;
 
   GLuint vertex_shader;
   GLuint output_shader;
   GLuint monitor_shader;
 
-  GLuint fragment_shaders[FRAG_COUNT];
+  GLuint *fragment_shaders;
 
-  GLuint itime_locations[FRAG_COUNT];
-  GLuint itempo_locations[FRAG_COUNT];
-  GLuint ifps_locations[FRAG_COUNT];
-  GLuint ires_locations[FRAG_COUNT];
+  GLuint *itime_locations;
+  GLuint *itempo_locations;
+  GLuint *ifps_locations;
+  GLuint *ires_locations;
 
-  GLuint textures_locations[FRAG_COUNT + 1][TEX_COUNT];
+  GLuint *textures_locations[TEX_COUNT];
 
-  GLuint sub_src_indexes[FRAG_COUNT][SUB_COUNT];
-  GLuint sub_fx_indexes[FRAG_COUNT][SUB_COUNT];
-  GLuint sub_mix_indexes[FRAG_COUNT][2];
+  GLuint sub_src_indexes[6][SUB_COUNT]; // TODO change
+  GLuint sub_fx_indexes[6][SUB_COUNT];
+  GLuint sub_mix_indexes[6][2];
 
-  GLuint vpos_locations[FRAG_COUNT + 1];
+  GLuint *vpos_locations;
 
   GLuint vertex_buffer;
   GLuint vertex_array;
 
-  GLuint frame_buffers[FRAG_COUNT];
+  GLuint *frame_buffers;
   GLuint textures[TEX_COUNT];
 
   GLenum draw_buffers[TEX_COUNT];