diff --git a/requirements.txt b/requirements.txt
index b0ef8cc..30bf384 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1 +1,2 @@
+interegular==0.3.3
 lark==1.2.2
diff --git a/spf.lark b/spf.lark
index 3aa6a56..e086cea 100644
--- a/spf.lark
+++ b/spf.lark
@@ -1,16 +1,22 @@
-start: (instruction)* TERMINAL
+start: (instruction)*
 
-instruction: KEYWORD TERMINAL
-		   | declaration TERMINAL
+instruction: keyword expression TERMINAL
+		   | type declaration TERMINAL
+		   | assignation TERMINAL
+		   | test
+		   | loop
 
-declaration: TYPE VARIABLE
-		   | TYPE VARIABLE "=" expression
+declaration: VARIABLE (EQUAL_SIGN expression)?
+
+assignation: VARIABLE EQUAL_SIGN expression
 
 expression: literal
 		  | list
 		  | range
-		  | expression operator expression
-		  | operator expression
+		  //| expression operator expression
+		  //| operator expression
+
+type: "booléen" | "entier" | "texte" | "liste"
 
 literal: ENTIER
 	   | BOOLEEN
@@ -25,35 +31,49 @@ range: "[" ENTIER? ":" ENTIER? "]"
 controls: test
 		| loop
 
-operator: PLUS
-		| MINUS
-		| TIMES
-		| DIVIDE // TODO: not complete
+operator: PLUS_SIGN
+		| MINUS_SIGN
+		| TIMES_SIGN
+		| DIVIDE_SIGN // TODO: not complete
 
-PLUS: "+"
-MINUS: "-"
-TIMES: "*"
-DIVIDE: "/"
+PLUS_SIGN: "+"
+MINUS_SIGN: "-"
+TIMES_SIGN: "*"
+DIVIDE_SIGN: "/"
+
+EQUAL_SIGN: "="
 
 test: "si" expression "alors" "{" instruction* "}"
+    | "si" expression "alors" "{" instruction* "}" "sinon" "{" instruction* "}"
 
-loop: "si" expression "alors" "{" (instruction)* "}"
-
-COMMENT: "#" /[^\n]/
-%ignore COMMENT
+loop: WHILES_KW expression WHILEE_KW "{" (instruction)* "}"
 
 TERMINAL: ";"
 
-VARIABLE: /([a-z]|[A-Z]|_)+([a-z]|[A-Z]|[0-9]|_)+/ // TODO: ajouter accents
-
-TYPE: "booléen" | "entier" | "texte" | "liste"
-
-KEYWORD: "ajouter" | "afficher"
-
-ENTIER: /[1-9][0-9]*/
-
-BOOLEEN: "vrai" | "faux"
-
-STRING: /\w+/
+VAR_CHARS: /[a-zA-Zçâêîôûéàèìòùëïü_]/
+VARIABLE: VAR_CHARS (VAR_CHARS | /[0-9]/)* 
 
 
+ADD_KW: "ajouter"
+SHOW_KW: "afficher"
+WHILES_KW: "tant que"
+WHILEE_KW: "faire"
+
+keyword: ADD_KW 
+	   | SHOW_KW
+
+%import common.INT -> ENTIER
+
+TRUE_KW: "vrai"
+FALSE_KW: "faux"
+
+BOOLEEN: TRUE_KW 
+	   | FALSE_KW
+
+%import common.ESCAPED_STRING -> STRING
+
+COMMENT: /#[^\n]*/
+%ignore COMMENT
+
+%import common.WS
+%ignore WS
diff --git a/spf.py b/spf.py
index 0951032..8acd6d1 100755
--- a/spf.py
+++ b/spf.py
@@ -29,11 +29,13 @@ def main():
         print("Trace activated (TODO)", file=sys.stderr)
 
     with open("spf.lark") as grammar:
-        spf_parser = lark.Lark(grammar, parser="lalr", transformer=SPFTransformer)
+        spf_parser = lark.Lark(grammar, parser="lalr", strict=True, debug=True)
 
     with open(args.spf_file) as spf_input:
         program = spf_input.read()
-        spf_parser.parse(program)
+        parsed = spf_parser.parse(program)
+
+    print(parsed.pretty())
 
 
 if __name__ == "__main__":