diff --git a/makefile b/makefile
index 18eac52..6ef4d47 100644
--- a/makefile
+++ b/makefile
@@ -1,11 +1,11 @@
 .PHONY: debug release run
 
-release: src/wta.c
-	gcc -o build/wta -O2 -Wall -Wextra -pedantic -Werror src/wta.c
+release: src/wte.c
+	gcc -o build/wte -O2 -Wall -Wextra -pedantic -Werror src/wte.c
 
 run: release
-	./build/wta
+	./build/wte
 
-debug: src/wta.c
-	gcc -o build/wta -ggdb3 -DDEBUG -Wall -Wextra -pedantic -Werror src/wta.c
+debug: src/wte.c
+	gcc -o build/wte -ggdb3 -DDEBUG -Wall -Wextra -pedantic -Werror src/wte.c
 
diff --git a/src/wta.c b/src/wte.c
similarity index 70%
rename from src/wta.c
rename to src/wte.c
index 27fb825..c353686 100644
--- a/src/wta.c
+++ b/src/wte.c
@@ -7,22 +7,38 @@
 #else
 #define dbg(format, ...)
 #endif
+
 #define c_red "\033[1;31m"
 #define c_green "\033[1;32m"
 #define c_yellow "\033[1;33m"
 #define c_end "\033[0m"
 
+#define error(format, ...) do {\
+  fprintf(stderr, c_red "[ERROR] "format c_end"\n", __VA_ARGS__); \
+} while(0)
+
+
+static int get_proposition()
+{
+  int ret = 0;
+  return ret;
+}
 
 int main(const int argc, const char **argv)
 {
   if (2 == argc) {
     if ('-' == argv[1][0] && 'h' == argv[1][1] && '\0' == argv[1][2]) {
-      printf("wte - what to eat\na simple decision making tool for food\n");
+      printf("wte - what to eat\na simple decision making tool for food\nuse without options\n");
     } else {
       printf("unrecognized option, try %s -h\n", *argv);
     }
     goto exit_main;
   }
+  if (!get_proposition()) {
+    error("%s", "error");
+  }
+
+
 exit_main:
   return 0;
 }