/**
 * Send a byte through Serial to be used by Processing
 * I am pretty sure the original code was written by Tom Igoe
 */

int analogPin = 0;
int analogValue = 0;
int forwardLedPin = 3;
int backwardLedPin = 11;
int pwmValue = 0;

void setup()
{
  // start serial port at 9600 bps:
  Serial.begin(9600);
}

void loop()
{
  // read analog input, divide by 4 to make the range 0-255:
  analogValue = analogRead(analogPin);
  analogValue = analogValue / 4;
  Serial.print(analogValue, BYTE);
  // figure out which LED should be on
  // if the values are between 0-127, then the backwardLed should be lit
  if(analogValue <= 127){
    pwmValue = map(analogValue, 127, 0, 0, 255);
    analogWrite(backwardLedPin, pwmValue);
    analogWrite(forwardLedPin, 0);// this will make sure the other LED is off
  }
  // if the values are between 128-255, then the forwardLed should be lit
  // pwm an led to show that the pot is working
  if(analogValue >= 128){
    pwmValue = map(analogValue, 128, 255, 0, 255);
    analogWrite(forwardLedPin, pwmValue);
    analogWrite(backwardLedPin, 0);// this will make sure the other LED is off
  }
  // pause for 10 milliseconds:
  delay(10);
}