//int led1 = 1; //int led2 = 2; //int led3 = 3; //int led4 = 4; //int led5 = 5; //int led6 = 6; //int led7 = 7; //int led8 = 8; //int led8 = 8; //int led9 = 9; //int led10 = 10; //int led11 = 11; //int led12 = 12; //int led13 = 13; //int led14 = 14; //int led15 = 15; // the setup routine runs once when you press reset: void setup() { // initialize all the pins as an output. for (int led=1; led<15;led++) pinMode(led, OUTPUT); } // the loop routine runs over and over again forever: void loop() { { for (int led=1; led<15;led++) digitalWrite(led, HIGH); // turn the LED on (HIGH is the voltage level) delay(200); // wait for 1 second in mS digitalWrite(led, LOW); // turn the LED off by making the voltage LOW delay(200); // wait for 1 second in mS } }