int ledB=3;
int ledR=6;
int analogPin=0;
int val=0;


void setup() {
  // put your setup code here, to run once:
Serial.begin(9600);
pinMode(ledB, OUTPUT);
pinMode(ledR, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
val=analogRead(analogPin);
Serial.println(val);


if (val >= 200 && val <= 500 )
analogWrite(ledB, 255); 

else if (val >= 600 && val <= 900 )
analogWrite(ledR,255);

else
analogWrite(ledB,0);
analogWrite(ledR,0);

// /4 because PWM is limited to 255 
//1024/4 = 256


}