int ledpin [] = {3, 5, 6, 9};
int potMeter = A1;

void setup() {
  Serial.begin(9600);
  for(int i = 0; i <4; i++){
    pinMode(ledpin[i], OUTPUT); // i++ = i plus 1
  }
  pinMode(potMeter, INPUT);

}

void loop() {
  int potValue = analogRead(potMeter);
  Serial.println(potValue);

  if (0 < potValue  && potValue < 256){
    analogWrite(ledpin[0], potValue);
  }
  else{
    analogWrite(ledpin[0], LOW);
  }
  
  if (256 < potValue  && potValue < 511){
    analogWrite(ledpin[1], potValue - 255);
  }
  else{
    analogWrite(ledpin[1], LOW);
  }

  if (511 < potValue && potValue < 767){
    analogWrite(ledpin[2], potValue - 510);
  }
  else{
    analogWrite(ledpin[2], LOW);
  }

  if (767 < potValue && potValue <= 1023){
    analogWrite(ledpin[3], potValue - 765);
  }
  else{
    analogWrite(ledpin[3], LOW);
  }

  
  
  }