const int photoPin=A0;
int photoValue=0;
int lightVal=0;
const int PinRed=9;
const int PinGreen=10;
const int PinBlue=11;
const int pinButt=6;
int newButt=0;
int lastButt=0;
int min = 1000;
int max = -1000;
unsigned long timeVal;

void setup()
{
  // put your setup code here, to run once:

Serial.begin(9600);
pinMode(photoPin, INPUT);
pinMode (PinRed, OUTPUT);
pinMode (PinBlue, OUTPUT);
pinMode(PinGreen, OUTPUT);
analogWrite(PinRed, 255);
analogWrite(PinGreen, 0);
analogWrite(PinBlue, 0);
delay (500);
analogWrite(PinRed, 0);
analogWrite(PinGreen, 255);
analogWrite(PinBlue, 0);
delay(500);
analogWrite(PinRed, 0);
analogWrite(PinGreen, 0);
analogWrite(PinBlue, 255);
}
void calibrate ()
{
  min = 5000;
  max = -5000;
  analogWrite (PinRed, 0);
  analogWrite (PinBlue, 0);
 digitalWrite (PinGreen, LOW);
 delay(200);
 digitalWrite(PinRed, HIGH);
 delay (200);
 digitalWrite(PinRed, LOW);
  timeVal =millis();
while (millis ()-timeVal<5000)
{
  photoValue = analogRead(photoPin);
  if (photoValue > max)
  {
    max = photoValue;
  }
  else if (photoValue < min)
  {
    min = photoValue;
  }
}
Serial.println(min);
Serial.println(max);
digitalWrite (PinGreen, LOW);
delay (200);
digitalWrite (PinGreen, LOW);
}
boolean debounce (boolean last)
{
  boolean current = digitalRead(pinButt);
  if (last != current)
  {
    delay(5);
    current = digitalRead(pinButt);
  }
  return current;
}

void loop()
{
  // put your main code here, to run repeatedly:
newButt = debounce (lastButt);
  if(newButt==HIGH && lastButt ==LOW)
  {
   calibrate();
  }
  lastButt=newButt;

photoValue=analogRead (photoPin);
lightVal=map (photoValue, min, max, 255, 0);
lightVal=constrain (lightVal, 0, 255);

analogWrite (PinRed, lightVal);
analogWrite (PinGreen,0);
analogWrite (PinBlue, lightVal);
{

if
(photoValue > (min && photoValue)< (max-min/3));
  analogWrite (PinBlue, lightVal);
  analogWrite (PinRed, lightVal);
  analogWrite (PinGreen, 0);

 else if
(photoValue > (min && photoValue) < (max-min/2));
  analogWrite (PinBlue, lightVal*.25);
  analogWrite (PinRed, lightVal * 71);
  analogWrite (PinGreen, lightVal * .12);

else if

  (photoValue > (min && photoValue) < (max-min/1));
  analogWrite (PinBlue, lightVal*50);
  analogWrite (PinRed, 0);
  analogWrite (PinGreen, lightVal * 90);
}