diff --git a/.gitignore b/.gitignore
index 888e1f5..3886d61 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,6 +4,7 @@
 *.obj
 *.out
 
+*.html
 .idea/
 *~
 *.DotSettings.user
diff --git a/AnimalProcessing/Fundamentals/wait.c b/AnimalProcessing/Fundamentals/wait.c
index e54b387..8e72937 100644
--- a/AnimalProcessing/Fundamentals/wait.c
+++ b/AnimalProcessing/Fundamentals/wait.c
@@ -22,11 +22,9 @@ int wait_child(int x){
     if(pid < 0) return -1;
 
     // Child 
-    else if (pid == 0) {
-        
-       if (x < 0) exit(-1); 
+    else if (pid == 0) {       
        
-       exit(fibo(x));
+        exit(fibo(x));
     }
 
     // Daddy
diff --git a/AnimalProcessing/Proficiencies/autre.c b/AnimalProcessing/Proficiencies/autre.c
deleted file mode 100644
index 121f141..0000000
--- a/AnimalProcessing/Proficiencies/autre.c
+++ /dev/null
@@ -1,63 +0,0 @@
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/wait.h>
-#include <unistd.h>
-#include <sys/types.h>
-#include <err.h>
-
-
-
-void clc(){
-
-
-    //pipes
-    int pipe1[2];// PIPE A
-    int pipe2[2];// PIPE B
-    if(pipe(pipe1) == -1) return;
-    if(pipe(pipe2) == -1) return;
-
-
-    char buffer[2048];
-    char buffer2[2048];
-    //fgets(buffer, 2047, stdin);
-
-
-    pid_t pid = fork();
-
-    if(pid < 0) return;
-    if (pid == 0){
-
-        while(read(pipe1[0],buffer ,2047 )){
-            int n = atoi(buffer);
-            
-            if(n == -1) exit(0);
-            char buf = n *n;
-
-            write(pipe2[1], &buf , 1);
-            
-
-        }
-    }
-
-    else{
-        
-        read(pipe2[0], buffer2, 2048);
-        if(strcmp(buffer2, "-1") == 0) {
-
-            close(pipe1[0]);
-            close(pipe1[1]);
-            close(pipe1[0]);
-            close(pipe1[1]);
-            return;
-        }
-        printf("The Oracle says the square is: %s\n", buffer2);
-    }
-}
-
-int main(){
-    
-    clc();
-
-
-}
diff --git a/AnimalProcessing/Proficiencies/double_pipe.c b/AnimalProcessing/Proficiencies/double_pipe.c
index 98af798..5deba32 100644
--- a/AnimalProcessing/Proficiencies/double_pipe.c
+++ b/AnimalProcessing/Proficiencies/double_pipe.c
@@ -14,56 +14,73 @@ ___( o)>
  Coic Coic
  */
 
-void clc(){
+int main(){
 
-    int n = 0;
+    //pipes
     int pipe1[2];
     int pipe2[2];  
+    if(pipe(pipe2) == -1) return 1;
+    if(pipe(pipe1) == -1) return 1;
+
     char buffer[2048];
-
-    if(pipe(pipe2) == -1) return;
-    if(pipe(pipe1) == -1) return;
-
-    fgets(buffer, 2047, stdin);
-    n = atoi(buffer);
-    pipe1[1] = n;
-
+    
     pid_t pid = fork();
 
-    if(pid < 0) return;
+    if(pid < 0) return 1;
     
     //Child
     if(pid == 0) {
 
-        while(1){
+        close(pipe1[1]);
+        close(pipe2[0]);
 
-            if(pipe1[0]){
-                pipe2[1] = n* n;
-                exit(0);
-            }
+        int n;
+
+        while(read(pipe1[0], &n, sizeof(int))){
+
+            int rslt = n * n;
+            write(pipe2[1], &rslt, sizeof(int));
         }
+
+        close(pipe1[0]);
+        close(pipe2[1]);
+        exit(0);
+        
     }
     
     //Teacher ? WTF what are you doing with my uncle ? Why do you have an eggplant in your right hand and a riding whip in your left hand ? WTF is going on here    
     else {
         
-        if(n == -1) {
-            close(pipe1[0]);
-            close(pipe2[1]);
-            return;} 
+        close(pipe1[0]);
+        close(pipe2[1]);
         
-        pipe1[1] = n;
+        int nbr = 0;
+        while(fgets(buffer, 2047, stdin)){
+
+            nbr = atoi(buffer);
+
+            if(nbr == -1) break;
+
+            write(pipe1[1], &nbr, sizeof(int));
+
+            int rslt; 
+            read(pipe2[0], &rslt, sizeof(int));
+            printf("The Oracle says the square is: %i\n", rslt);
+        }
         
+        close(pipe1[1]);
+        close(pipe2[0]);
+
         wait(NULL); //on attends le Child
         
-        printf("The Oracle says the square is: %i\n", pipe2[0]);
+        
     } 
 }
 
 
-int main() {
+//int main() {
 
-    clc();
+//    clc();
     
     /*
     //[0] -> lecture | [1]-> ecriture
@@ -105,4 +122,4 @@ int main() {
         
     }*/
 
-}
+//}
diff --git a/AnimalProcessing/Proficiencies/dup.c b/AnimalProcessing/Proficiencies/dup.c
index 3a7fb6f..a695ab5 100644
--- a/AnimalProcessing/Proficiencies/dup.c
+++ b/AnimalProcessing/Proficiencies/dup.c
@@ -20,11 +20,12 @@ int duper(char **argv, char *output){
 
     //int fd[2];
     //pipe(fd);
-
+    if(!argv || !*argv || !output) return 1;
+    
     int wstatus;
     pid_t pid = fork();
 
-    if(pid < 0) return -1;
+    if(pid < 0) return 1;
 
     //Child
     else if (pid == 0){
diff --git a/AnimalProcessing/Proficiencies/project.c b/AnimalProcessing/Proficiencies/project.c
index b029511..9135f6b 100644
--- a/AnimalProcessing/Proficiencies/project.c
+++ b/AnimalProcessing/Proficiencies/project.c
@@ -60,6 +60,8 @@ char** split(char* line){
 
 int exec_cmd(char** args){
 
+    if(!args || !*args) return -1;
+    
     int wstatus;
     pid_t pid = fork();
 
@@ -85,7 +87,7 @@ int exec_cmd(char** args){
         if(waitpid(pid, &wstatus, 0) ==  -1) return -1; 
         
         if( WIFEXITED(wstatus)){
-            if(WEXITSTATUS(wstatus) == 255) return 1;
+            if(WEXITSTATUS(wstatus) == 255) return -1;
             else return WEXITSTATUS(wstatus);
     }}
     return 0;
@@ -135,7 +137,7 @@ int execution_loop(){
             //execution du run <commande> via le child 
             else if (strcmp(args[0], "run") == 0){
                 //printf("test\n");
-                last_code = exec_cmd(args);
+                if(args[1]) last_code = exec_cmd(args);
             }
             
             //interrogation du last_code 
@@ -158,11 +160,11 @@ int is_terminal()
 {
     return isatty(STDIN_FILENO) && isatty(STDOUT_FILENO);
 }
+/*
 int main() {
   printf("\n Code de fin : %i\n",execution_loop());
 }
-
-
+*/
 
 /*
 int main(){
diff --git a/AnimalProcessing/Proficiencies/test b/AnimalProcessing/Proficiencies/test
deleted file mode 100755
index 2c08d6b..0000000
Binary files a/AnimalProcessing/Proficiencies/test and /dev/null differ