const byte led = 13;
int ldr;

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

}



void loop() {
  // put your main code here, to run repeatedly:
int pot = analogRead(A0);


ldr = analogRead(A0);
if (ldr < 800)
digitalWrite(led, HIGH);
else;
digitalWrite(led, LOW);
float a = (5.0/1024.0) * pot;

Serial.println(a);

}