void setup() {
pinMode(A1, INPUT);
pinMode(8, OUTPUT);
pinMode(3, OUTPUT);
Serial.begin(115200);
}

void loop() {
int a=analogRead(A1);
Serial.println(a);
delay(1000);
if (a<300)
{
digitalWrite(8, HIGH);
digitalWrite(3, LOW);
}
else
{

digitalWrite(8, LOW);
digitalWrite(3, HIGH);

}
}