int photocellPin = 4;    // the photocell and 10K pulldown are connected to a1 – change A1 to 4 for WOKWI 
int photocellReading;     // the analogue reading from the sensor 
 
void setup(void) { 
  // put your setup code here, to run once: 
   
} 
  
void loop(void) { 
  // put your main code here, to run repeatedly: 
   
  delay(1000); 
}