please insert a code into this code this instruction:

0 ppm-49ppm --> ventilation will OFF

ppm > 50ppm --> ventilation will ON

Ventilation system is PLC

/* MQ-7 Carbon Monoxide Sensor Circuit with Arduino const int AOUTpin=0;//the AOUT pin of the CO sensor goes into analog pin AO of the arduino const int DOUTpin=8://the DOUT pin of the CO sensor goes into digital pin D8 of the arduino const int ledPin=13://the anode of the LED connects to digital pin D13 of the arduino int limit; int value; void setup() { Serial.begin(115200)://sets the baud rate pinMode(DOUTpin, INPUT);//sets the pin as an input to the arduino pinMode(ledPin, OUTPUT);//sets the pin as an output of the arduino void loop value= analogRead(AOUTpin);//reads the analaog value from the CO sensor's AOUT pin limit= digitalRead(DOUTpin);//reads the digital value from the CO sensor's DOUT pin Serial.print("CO value: "); Serial.println(value)://prints the CO value Serial.print("Limit: "); Serial.print(limit);//prints the limit reached as either LOW or HIGH (above or underneath) delay(100); if (limit == HIGH){ digitalWrite(ledPin, HIGH)://if limit has been reached, LED turns on as status indicator else{ digitalWrite(ledPin, LOW);//if threshold not reached, LED remains off