void setup()
{
  Serial.begin(115200);
  Serial.println("come thai");
  pinMode(22,OUTPUT);
  pinMode(19, INPUT_PULLUP);
  pinMode(21, INPUT_PULLUP);
}
void loop()
{
  if(digitalRead(19) == LOW ){
    digitalWrite(22,HIGH);
  }
  if(digitalRead(21) == LOW ){
    digitalWrite(22,LOW);
  }
}