//CONSTANTS
const int numberOfValues = 10; //number of values to remember at a time
const int numberOfZerosNeeded = 3; //number of zeros needed in all the values for the switch to be considered pressed
const int lowValueThreshold = 100; //threshold for a value to be considered 0
const int ledPin = 6; //pin for the light
const int inputPin = 3; //pin for the input

//last # values received from the input pins
int values[numberOfValues];
int currentValue = 0; //increment everytime

//init
void setup() {
  //setup arduino
  Serial.begin(9600);
  
  //setup the led
  pinMode(ledPin,OUTPUT);
  digitalWrite(ledPin,LOW);
  
  //setup the values
  for (int i=0; i<numberOfValues; i++) values[i] = 0;
}


//main loop
void loop() {
  //read the value for the pin
  int value = analogRead(3);
  
  //change the average value
  values[currentValue] = value;
  currentValue++;
  if (currentValue>=numberOfValues) currentValue = 0;
  
  //get the number of zeros
  int numberOfZeros = 0;
  for (int i=0;i<numberOfValues; i++) {
    if (values[i] < lowValueThreshold) numberOfZeros++;
  }
  
  //light the pin or close it if needed
  if (numberOfZeros > numberOfZerosNeeded) {
    digitalWrite(ledPin,HIGH);
  } else {
    digitalWrite(ledPin,LOW);
  }
  
  //
  Serial.println(  value  );
  delay(100);
}