int temp=100;

void setup() {
  // put your setup code here, to run once:
pinMode(10, OUTPUT);
Serial.begin(9600);
}

void loop() {
  // put your main code here, to run repeatedly:
  while(temp>30){
    digitalWrite(10, HIGH); delay(250);
    digitalWrite(10, LOW); delay(250);
  temp -= 1;
  Serial.println(temp);
  }
  
}