CODE
void setup() {
// put your setup code here, to run once:
pinMode(2, OUTPUT);
pinMode (3, OUTPUT);
pinMode (4, OUTPUT);
}
void loop() {
// put your main code here, to run repeatedly:
digitalWrite (2, HIGH);
delay (4000);
digitalWrite (2, LOW);
delay (5);
digitalWrite (3, HIGH);
delay (4000);
digitalWrite (3, LOW);
delay (5);
digitalWrite (4, HIGH);
delay (4000);
digitalWrite (4, LOW);
delay (5);
}