void setup() { pinMode(3,OUTPUT); pinMode(4,OUTPUT); pinMode(5,OUTPUT); pinMode(6,OUTPUT); } void loop() { digitalWrite(3,HIGH); delay(100); digitalWrite(3,LOW); digitalWrite(4,HIGH); delay(200); digitalWrite(4,LOW); digitalWrite(5,HIGH); delay(200); digitalWrite(5,LOW); digitalWrite(6,HIGH); delay(200); digitalWrite(6,LOW); digitalWrite(5,HIGH); delay(200); digitalWrite(5,LOW); digitalWrite(4,HIGH); delay(200); digitalWrite(4,LOW); digitalWrite(3,HIGH); delay(200); digitalWrite(3,LOW); }