diff --git a/src/lex/lexer.l b/src/lex/lexer.l
index c9bf739..2307af7 100644
--- a/src/lex/lexer.l
+++ b/src/lex/lexer.l
@@ -79,7 +79,15 @@
 [0-9]+    {DEBUG("\"%s\" tokenized with \'ValInt\'", yytext); yylval.string = strdup(yytext); return(ValInt); };
 [0-9]*\.[0-9]+ {DEBUG("\"%s\" tokenized with \'ValFloat\'", yytext); yylval.string = strdup(yytext); return(ValFloat);};
 [a-zA-Z_0-9]+ {DEBUG("\"%s\" tokenized with \'Ident\'", yytext); yylval.string = strdup(yytext); return(Ident); };
-\"([^\"\n])*\" {DEBUG("\"%s\" tokenized with \'ValStr\'", yytext); yylval.string = strdup(yytext); return(ValStr);};
-\"\"\"([^\"\n]|\\\n)*\"\"\" {DEBUG("\"%s\" tokenized with \'ValMultistr\'", yytext); yylval.string = strdup(yytext); return(ValMultistr);};
+\"([^\"\n])*\" {
+    yytext = yytext +1;
+    yytext[yyleng - 2] = 0;
+    
+    DEBUG("\"%s\" tokenized with \'ValStr\'", yytext); yylval.string = strdup(yytext); return(ValStr);};
+\"\"\"([^\"\n]|\\\n)*\"\"\" {
+    yytext = yytext +3;
+    yytext[yyleng - 4] = 0;
+
+    DEBUG("\"%s\" tokenized with \'ValMultistr\'", yytext); yylval.string = strdup(yytext); return(ValMultistr);};
 .;
 %%
diff --git a/src/main.c b/src/main.c
index 03ab6b9..fab7659 100644
--- a/src/main.c
+++ b/src/main.c
@@ -6,6 +6,7 @@
 #define LOG_LEVEL LOG_LEVEL_DEBUG
 
 extern FILE *yyin;
+AST_NODE_PTR root;
 
 /**
  * @brief Log a debug message to inform about beginning exit procedures
@@ -65,7 +66,11 @@ int main(int argc, char *argv[]) {
   }
   yyin = file;
 
+  root = AST_new_node(AST_Module, NULL);
   yyparse();
 
+  FILE *output = fopen("test.txt", "w");
+  AST_fprint_graphviz(file, root);
+  fclose(output);
   return 0;
 }
diff --git a/src/yacc/parser.y b/src/yacc/parser.y
index e654eff..89c4433 100644
--- a/src/yacc/parser.y
+++ b/src/yacc/parser.y
@@ -6,7 +6,7 @@
     int yyerror(char*);
 
     extern int yylex();
-
+    extern AST_NODE_PTR root;
     
 }
 
@@ -111,15 +111,8 @@
 %left OpBitand OpBitor OpBitxor OpBitnot
 
 %%
-program: program programbody {AST_push_node($1, $2);
-                              FILE *file = fopen("test.txt", "w");
-                              AST_fprint_graphviz(file, $1);
-                              fclose(file);}
-       | programbody {AST_NODE_PTR program = AST_new_node(AST_Module, NULL);
-                      AST_push_node(program, $1);
-                      FILE *file = fopen("test.txt", "w");
-                      AST_fprint_graphviz(file, program);
-                      fclose(file); };
+program: program programbody {AST_push_node(root, $2);}
+       | programbody {AST_push_node(root, $1);};
 
 programbody: moduleimport {$$ = $1;}
        | fundef{$$ = $1;}