class4_6LEDs to pot mapping_with for loop

/*
The Goal: Using the map() function, we will control
 6 LEDs' PWM value, by slicing the incoming value
 from a potentiometer.
 */

int LEDpins[] = {
  3,5,6,9,10,11};// an array of the PWM pins
int PWMvals[6];// an array of the PWM values: 0-255, initialized in setup()
int potVal = 0;// potentioter value: 0-1023
int LEDpotValWindow;

int numLEDs = 6;// number of LEDs

void setup(){
  for(int i = 0; i < numLEDs; i++){
    //pinMode( LEDpins[i], OUTPUT);
    PWMvals[i] = 0;
  }
  Serial.begin(9600);
  LEDpotValWindow = 1023 / numLEDs;
}

void loop(){
  // first thing is to grab the potentiometer value
  potVal = analogRead(A0);

  // now we want to turn on only the leds that should be lit
  // and then only as much as they should be lit.

  for( int i = 0; i < numLEDs; i++){
    if( potVal > (LEDpotValWindow * i) && potVal < ( LEDpotValWindow *(i+1)) ){
      PWMvals[i] = map(potVal, LEDpotValWindow * i, LEDpotValWindow *(i+1), 0, 255);
    }
    else if(potVal > ( LEDpotValWindow *(i+1))) {
      PWMvals[i] = 255;
    }
    else{
      PWMvals[i] = 0;
    }
    analogWrite(LEDpins[i], PWMvals[i]);
  }
}