void setup(){
//start serial connection
Serial.begin(9600);
//configure pin2 as an input and enable the internal pull-up resistor
pinMode(2, INPUT_PULLUP);
pinMode(13, OUTPUT);
int now=0;
}
void loop(){
//read the pushbutton value into a variable
int sensorVal = digitalRead(2);
if (sensorVal == HIGH) {
digitalWrite(13, LOW);
}
else {
digitalWrite(13, HIGH);
Serial.write(65);
delay(120);
}
}

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