const int analogPin = A0;   
                            const int ledCount = 10;   

                            int ledPins[] = {
                              2, 3, 4, 5, 6, 7, 8, 9, 10, 11
                              };   


                              void setup() {
                                
                                  for (int thisLed = 0; thisLed < ledCount; thisLed++) {
                                      pinMode(ledPins[thisLed], OUTPUT);
                                        }
                                        }

                                        void loop() {
                                          
                                            int sensorReading = analogRead(analogPin);
                                            
                                                int ledLevel = map(sensorReading, 0, 1023, 0, ledCount);

                                                  
                                                    for (int thisLed = 0; thisLed < ledCount; thisLed++) {
                                                        
                                                                if (thisLed < ledLevel) {
                                                                      digitalWrite(ledPins[thisLed], HIGH);
                                                                          }
                                                                          
                                                                                  else {
                                                                                        digitalWrite(ledPins[thisLed], LOW);
                                                                                            }
                                                                                              }
                                                                                              }