const int ledPin = 5;
const int buttonPin = 4;

int ledState=LOW;
int buttonState=0;
int lastButtonState=0;

void setup() {
  Serial.begin(115200);
  pinMode(ledPin,OUTPUT);
  pinMode(buttonPin;INPUT);
}

void loop() {
  buttonState = digitalRead(buttonPin);
  if(buttonState==HIGH && lastButtonState==LOW){
    ledState=(lastButtonState==LOW )?HIGH:LOW;
  digitalWrite(ledPin, HIGH);
}
Serial.println(ledState);
lastButtonState=buttonState;
}
//ณิชนิตา ชัยนำบิน เลขที่13