byte led1= 7;
byte led2= 5;
byte led3= 3;
byte led4= 2;
byte led5= 1;

void setup() {
  // put your setup code here, to run once:
pinMode(led1, OUTPUT);
pinMode(led2, OUTPUT);
pinMode(led3, OUTPUT);
pinMode(led4, OUTPUT);
pinMode(led5, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
digitalWrite(led3, HIGH);
delay(500);
digitalWrite(led3, LOW);
delay(25);
digitalWrite(led2, HIGH); digitalWrite(led4, HIGH);
delay(250); delay(250);
digitalWrite(led2, LOW); digitalWrite(led4, LOW);
delay(25); delay(25);
digitalWrite(led1, HIGH); digitalWrite(led5, HIGH);
delay(250); delay(250);
digitalWrite(led1, LOW); digitalWrite(led5, LOW);
delay(25); delay(25);
digitalWrite(led2, HIGH); digitalWrite(led4, HIGH);
delay(250); delay(250);
digitalWrite(led2, LOW); digitalWrite(led4, LOW);
delay(25); delay(25);


}