int LED1 = 2;
int LED2 = 3;
int LED3 = 4;
int btn = 5;

void setup() {
pinMode(LED1, OUTPUT);
pinMode(LED2, OUTPUT);
pinMode(LED3, OUTPUT);
pinMode(btn, INPUT_PULLUP);
digitalWrite(LED1, LOW);
digitalWrite(LED2, LOW);
digitalWrite(LED3, LOW);
}

void loop() {
if (digitalRead(btn) == LOW){
digitalWrite(LED1, HIGH);
delay(5000);
digitalWrite(LED1, LOW);
delay(100);
digitalWrite(LED1, HIGH);
delay(5000);
digitalWrite(LED1, LOW);

digitalWrite(LED2, HIGH);
delay(5000);
digitalWrite(LED2, LOW);
delay(100);
digitalWrite(LED2, HIGH);
delay(5000);
digitalWrite(LED2, LOW);

digitalWrite(LED3, HIGH);
delay(5000);
digitalWrite(LED3, LOW);
delay(1000);
digitalWrite(LED3, HIGH);
delay(5000);
digitalWrite(LED3, LOW);
}
}