#define LED1 19
#define LED2 18
#define LED3 5
#define LED4 17
#define LED5 16
#define LED6 4
#define LED7 0
void setup() {
 pinMode(LED1, OUTPUT);
 pinMode(LED2, OUTPUT);
 pinMode(LED3, OUTPUT);
 pinMode(LED4, OUTPUT);
 pinMode(LED5, OUTPUT);
 pinMode(LED6, OUTPUT);
 pinMode(LED7, OUTPUT);

}

void loop() {
 digitalWrite(LED4, HIGH);
 delay(1000);
 digitalWrite(LED3, HIGH);
 digitalWrite(LED5, HIGH);
 delay(1000);
 digitalWrite(LED2, HIGH);
 digitalWrite(LED6, HIGH);
 delay(1000);
 digitalWrite(LED1, HIGH);
 digitalWrite(LED7, HIGH);
 delay(1000);
 digitalWrite(LED1, LOW);
 digitalWrite(LED2, LOW);
 digitalWrite(LED3, LOW);
 digitalWrite(LED5, LOW);
 digitalWrite(LED6, LOW);
 digitalWrite(LED7, LOW);
}