int readpin=A1;
int greenpin=10;
int timedelay=500;
int readvalue=0;
int ledvalue=0;

void setup() {
  // put your setup code here, to run once:
pinMode(readpin, INPUT);
pinMode(greenpin, OUTPUT);
Serial.begin(9600);
}

void loop() {
  // put your main code here, to run repeatedly:
readvalue=analogRead(readpin);
ledvalue=(255.0/1023.0)*readvalue;
analogWrite(greenpin,ledvalue);
Serial.print(ledvalue  );
Serial.print("  ");
Serial.println(readvalue);
delay(timedelay);
}