Kontrol Lampu Via Suara Dengan Android dan Arduino

bang, ane buat mirip kayak gini tapi kok begitu upload selesai langsung nyala terus ya bang? mohon bimbingannya bang.. yg salah dimana ini?

#include <SoftwareSerial.h>
SoftwareSerial BT(9,10);
String perintah;
void setup() {
BT.begin(9600);
Serial.begin(9600);
pinMode(2, OUTPUT);
pinMode(3, OUTPUT);
}
void loop() {
while (BT.available()) {
delay(10);
char c = BT.read();
perintah += c;
}
if(perintah.length() > 0) {
Serial.println(perintah);
if (perintah == "power on")
{ digitalWrite(2, HIGH); }
else if(perintah == "power off")
{ digitalWrite(2, LOW); }
else if(perintah == "start")
{ digitalWrite(3, HIGH); }
else if(perintah == "off")
{ digitalWrite(3, LOW); }
else if(perintah == "lets go boy")
{ digitalWrite(2, HIGH);
digitalWrite(3, HIGH); }
else if(perintah == "shut off")
{ digitalWrite(2, LOW);
digitalWrite(3, LOW); }
perintah="";}
}