void setup() {
  Serial.begin(115200);
  pinMode(18, OUTPUT);
  pinMode(14, INPUT);
  pinMode(4, OUTPUT);
}

void loop() {
   
 
int suis = digitalRead(14);
 if(suis == 1)
 {
  Serial.println("suis telah ditekan");
  digitalWrite(4, LOW);
 }
 else
 {
  Serial.println("suis telah dilepaskan");
  digitalWrite(4, HIGH);
 }

 digitalWrite(18, HIGH);
 delay(1000);
 digitalWrite(18, LOW);
 delay(1000);

}