void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  pinMode(12, OUTPUT);
  pinMode(4, OUTPUT);
  pinMode(25, OUTPUT);
  pinMode(18, OUTPUT);
  pinMode(5, OUTPUT);
  pinMode(2, OUTPUT);
  pinMode(19, INPUT);
  

}

void loop() {
  int switchcase=digitalRead(19);
 if(switchcase==1){
 
  digitalWrite(12, HIGH);
  digitalWrite(4, LOW);
  digitalWrite(25, LOW);
  digitalWrite(18, LOW);
  digitalWrite(5, LOW);
  digitalWrite(2, HIGH);
  delay(3000); 
  digitalWrite(12, LOW);
  digitalWrite(4, LOW);
  digitalWrite(25, HIGH);
  digitalWrite(18, LOW);
  digitalWrite(5, HIGH);
  digitalWrite(2, LOW);
  
  delay(3000);
  digitalWrite(12, LOW);
  digitalWrite(4, HIGH);
  digitalWrite(25, LOW);
  digitalWrite(18, HIGH);
  digitalWrite(5, LOW);
  digitalWrite(2, LOW);
  delay(3000);
  
 }
 else{
 digitalWrite(12, LOW);
 digitalWrite(4, LOW);
 digitalWrite(25, LOW);
  digitalWrite(18, LOW);
  digitalWrite(5, LOW);
   digitalWrite(2, LOW);
   
}
 }