void setup()
{
  Serial.begin(115200);
  pinMode(14, OUTPUT);
  pinMode(33,OUTPUT);
  pinMode(25,OUTPUT);
  pinMode(18, OUTPUT);
  pinMode(16, OUTPUT);
  pinMode(4, OUTPUT);
  pinMode(21, INPUT);
}
 
void loop()
{
   int swch =digitalRead(21);
  Serial.println(swch);
  if(swch == 1)
  {
  digitalWrite(25, HIGH);
  Serial.println("stop"); 
  digitalWrite(4, HIGH);
  Serial.println("GO");
  delay(6000);
  digitalWrite(4, LOW);
  digitalWrite(25, LOW);
  digitalWrite(33, HIGH);
  Serial.println("caution");
  digitalWrite(16, HIGH);
  Serial.println("caution");
  delay(7000);
  digitalWrite(16, LOW);
  digitalWrite(33, LOW);
  digitalWrite(14, HIGH);
  Serial.println("GO");
  digitalWrite(18, HIGH);
  Serial.println("stop");
  delay(6000);
  digitalWrite(18, LOW);
  digitalWrite(14, LOW);
  digitalWrite(33, HIGH);
  Serial.println("caution");
  digitalWrite(16, HIGH);
  delay(4000);
  digitalWrite(33, LOW);
  digitalWrite(16, LOW);
}
else
{
 digitalWrite(14, LOW);
 digitalWrite(33, LOW); 
 digitalWrite(25, LOW);
 digitalWrite(18, LOW);
 digitalWrite(16, LOW);
 digitalWrite(4, LOW);
}
}