byte sensor= A0;
byte led= 13;
byte led2= 12;
byte led3= 11;

int nilai;
int output;
int output2;
void setup() {
 pinMode(led, OUTPUT);  
 pinMode(led2, OUTPUT);
 pinMode(led3, OUTPUT);
 Serial.begin(9600);
}

void loop() {
nilai=analogRead(sensor);
output=map(nilai, 0, 1023, 0, 255);
output2=map(nilai, 0, 1023, 255, 0);
analogWrite(led, output2);
analogWrite(led2, output2);
analogWrite(led3, output);

  Serial.print("sensor: ");
Serial.print(nilai);
Serial.print("   ");
Serial.print("output: ");
Serial.print(output);
delay(2);
}