int analogReadVal;
int brightness;
int analogInput;


void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  pinMode(3,OUTPUT);

}

void loop() {
  // put your main code here, to run repeatedly:
  analogReadVal=analogRead(A0);
  brightness=map(analogReadVal,0,1023,0,255);
  analogWrite(3,brightness);
  Serial.println(brightness);


}