int led=13;
void setup() {
// put your setup code here, to run once:
pinMode(led,OUTPUT);
Serial.begin(9600);
}
void loop() {
// put your main code here, to run repeatedly:
Serial.println("time start now");
digitalWrite(led,HIGH);
delay(10000);
Serial.println("time over");
digitalWrite(led,LOW);
delay(2000);
}