int led=7; 

void setup() {
  // put your setup code here, to run once:

pinMode(led, OUTPUT);
}



void loop() {
  // put your main code here, to run repeatedly:
 digitalWrite(led, HIGH);   // turn the LED on (HIGH is the voltage level)
  delay(80);                       // wait for a second
  digitalWrite(7, LOW);    // turn the LED off by making the voltage LOW
  delay(20);                       // wait for a second
  digitalWrite(7, HIGH);   // turn the LED on (HIGH is the voltage level)
  delay(10);                       // wait for a second
  digitalWrite(7, LOW);    // turn the LED off by making the voltage LOW
  delay(10); 
  digitalWrite(7, HIGH);   // turn the LED on (HIGH is the voltage level)
  delay(10);                       // wait for a second
  digitalWrite(7, LOW);    // turn the LED off by making the voltage LOW
  delay(10); 
}