// Breathaylzer example by Rojas@SparkFun.com

int sensorPin = 0;    //alcohol sensor
int green1 = 10;      //green LED 1
int green2 = 11;      //green LED 2
int yellow1 = 6;      //yellow LED 1
int yellow2 = 9;      //yellow LED 2
int red1 = 5;         //red LED 1
int red2 = 3;         //red LED 2

int sensorValue = 0;   //default sensorValue is 0

void setup() {
  
  Serial.begin(9600);    //begin serial at 9600 baud
  pinMode(green1, OUTPUT); //set pins as outputs
  pinMode(green2, OUTPUT); 
  pinMode(yellow1, OUTPUT); 
  pinMode(yellow2, OUTPUT); 
  pinMode(red1, OUTPUT); 
  pinMode(red2, OUTPUT);   
}

void loop() {

  sensorValue = analogRead(sensorPin); //take analog in
  Serial.println(sensorValue);         //send it over serial
  
  if (sensorValue <= 170){        //the alcohol sensor usually idles around 170
    int green1Value = map(sensorValue, 0,170,0,255);  //map 0-170 from the sensor to 0-255 to fade the LED
    analogWrite(green1, green1Value);     //fade the LED
  }
  
  if (sensorValue >= 170 && sensorValue <= 340){ //if the sensor input is in the 170-340 range...
    int green2Value = map(sensorValue, 170,340,0,255); //map 170-340 from the sensor to 0-255 to fade the LED
    analogWrite(green2, green2Value);   //fade the LED
  }

  if (sensorValue >= 340 && sensorValue <= 510){  //if the sensor input is in the 340-510 range...
    int yellow1Value = map(sensorValue, 340,510,0,255); //map 340-510 from the sensor to 0-255 to fade the LED
    analogWrite(yellow1, yellow1Value);  //fade the LED
  }

    if (sensorValue >= 510 && sensorValue <= 680){  //if the sensor input is in the 510-680 range...
    int yellow2Value = map(sensorValue, 510,680,0,255);  //map 510-680 from the sensor to 0-255 to fade the LED
    analogWrite(yellow2, yellow2Value); //fade the LED
  } 
  
  if (sensorValue >= 680 && sensorValue <= 850){  //if the sensor input is in the 680-850 range...
    int red1Value = map(sensorValue, 680,850,0,255); //map 680-850 from the sensor to 0-255 to fade the LED
    analogWrite(red1, red1Value); //fade the LED
  }
  
  if (sensorValue >= 850){  //if the sensor input is in the 850-1023 range...
    int red2Value = map(sensorValue, 850,1023,0,255); //map 850-1023 from the sensor to 0-255 to fade the LED
    analogWrite(red2, red2Value); //fade the LED
  }
}