diff --git a/cmd/go-tr/main.go b/cmd/go-tr/main.go
index 47e6416..fef9767 100644
--- a/cmd/go-tr/main.go
+++ b/cmd/go-tr/main.go
@@ -15,25 +15,27 @@ func main() {
 
 func checkFlagsAreValid(source, target string) {
 	if source == "" || target == "" {
-		flag.Usage()
+		printUsage()
 		os.Exit(1)
 	}
 }
 
 func getFlags() (string, string) {
-	source := flag.String("source", "", "Golang source file")
-	target := flag.String("target", "", "Arduino sketch file")
+	// source := flag.String("source", "", "Golang source file")
+	// target := flag.String("target", "", "Arduino sketch file")
 	flag.Parse()
-	return *source, *target
+	source := flag.Arg(0)
+	target := flag.Arg(1)
+	return source, target
 }
 
 func printUsage() {
-	fmt.Print("This program transpiles Golang source into corresponding Arduino sketches.\n\n")
+	fmt.Print("This program transpiles Golang source into corresponding C code.\n\n")
 	fmt.Print("Options:\n")
 	flag.PrintDefaults()
 	fmt.Print("\n")
 	fmt.Print("Example:\n")
-	fmt.Printf("\tesp32 -source impl/blink/controller.go -target impl/blink/controller.transpile\n\n")
+	fmt.Printf("\tgo-tr controller.go controller.ino\n\n")
 }
 
 func safeTranspile(source, target string) {