Arduino LED with Variable Resister

int adv; 
int ledpin1 = 3; //led 1
int ledpin2 = 5; //led 2
int ledpin3 = 6; //led 3
int ledpin4 = 9; //led 4

void setup() {
  pinMode(ledpin1,OUTPUT);
  pinMode(ledpin2,OUTPUT);
  pinMode(ledpin3,OUTPUT);
  pinMode(ledpin4,OUTPUT);
  
}

void loop() {
  adv = analogRead(A0);

// Now You have to map value of Potentiometer
  analogWrite(ledpin1, map(adv, 0, 1023, 0, 255));
  analogWrite(ledpin2, map(adv, 0, 1023, 0, 255));
  analogWrite(ledpin3, map(adv, 0, 1023, 0, 255));
  analogWrite(ledpin4, map(adv, 0, 1023, 0, 255));
 
}