int sensor;
int led = 13;
int ledr= 7;
int ledy= 6;
int ledg= 5;

void setup()
{
  Serial.begin(115200);
  pinMode(A0,   INPUT);
  pinMode(led,  OUTPUT);
  pinMode(ledr, OUTPUT);
  pinMode(ledy, OUTPUT);
  pinMode(ledg, OUTPUT);
}

void loop()
{
  sensor = analogRead(A0);
  
  digitalWrite(ledr, 1);
  delay(sensor);
  digitalWrite(ledr, 0);
  delay(sensor);
  digitalWrite(ledy, 1);
  delay(sensor);
  digitalWrite(ledy, 0);
  delay(sensor);
  digitalWrite(ledg, 1);
  delay(sensor);
  digitalWrite(ledg, 0);
  delay(sensor);
}