void setup() 
{
  Serial.begin(115200);

}

void loop() 
{
  int AN0 = analogRead(A0);
  float V = AN0*5.0/1023;
  Serial.print(V);
  Serial.print(",");
  float Percent = AN0 *100.0/1023;
  Serial.print(Percent);
  Serial.print(",");
  Serial.println(AN0);
  
  int n,m;
  digitalWrite(25,1);
  for (n=0;n<Percent;n++)
    {
    delayMicroseconds(100); 
    digitalWrite(25,0);
    for(m=Percent;m<100;m++);
    }
    { 
    delayMicroseconds(100); 
    }
}