void setup() { pinMode(2, OUTPUT); pinMode(3, OUTPUT); pinMode(4, OUTPUT); pinMode(5, OUTPUT); pinMode(6, OUTPUT); pinMode(7, OUTPUT); pinMode(8, OUTPUT); pinMode(9, OUTPUT); pinMode(10, OUTPUT); pinMode(11, OUTPUT); pinMode(12, OUTPUT); pinMode(13, OUTPUT); } void loop() { digitalWrite(8, HIGH); delay(15); digitalWrite(8, LOW); delay(15); digitalWrite(7, HIGH); delay(15); digitalWrite(7, LOW); delay(15); digitalWrite(9, HIGH); delay(15); digitalWrite(9, LOW); delay(15); digitalWrite(6, HIGH); delay(15); digitalWrite(6, LOW); delay(15); digitalWrite(10, HIGH); delay(15); digitalWrite(10, LOW); delay(15); digitalWrite(5, HIGH); delay(15); digitalWrite(5, LOW); delay(15); digitalWrite(11, HIGH); delay(15); digitalWrite(11, LOW); delay(15); digitalWrite(4, HIGH); delay(15); digitalWrite(4, LOW); delay(15); digitalWrite(12, HIGH); delay(15); digitalWrite(12, LOW); delay(15); digitalWrite(3, HIGH); delay(15); digitalWrite(3, LOW); delay(15); digitalWrite(13, HIGH); delay(15); digitalWrite(13, LOW); delay(15); digitalWrite(2, HIGH); delay(15); digitalWrite(2, LOW); delay(15); }