// This example reads the level of ambient light from
// a photoresistor. The more light is detected, the more
// leds light up.

int r = 1;                    // analog input pin with photoresistor


void setup() {  
  for (int i=0; i<8; i++) {   // set digital pins 0-7 as outputs 
    pinMode(i, OUTPUT);  
  }
}


void loop() {   
  int v = analogRead(r);      // store analog input in variable v
    
  for (int i=0; i<8; i++) {
    if (v > 128 * i) {        // switch on leds, depending on v
      digitalWrite(i, HIGH);
    } else {
      digitalWrite(i, LOW);
    }
  }
}