//task1 part2
int red=23;
int yellow=5;
int green=16;
int D=1000;
void setup() {
pinMode(red, OUTPUT);
pinMode(yellow, OUTPUT);
pinMode(green, OUTPUT);

}

void loop() {
digitalWrite(red,HIGH);
delay(D);
digitalWrite(red,LOW);
digitalWrite(yellow,HIGH);
delay(D);
digitalWrite(yellow,LOW);
digitalWrite(green,HIGH);
delay(D);
digitalWrite(green,LOW);
}