#define POTENTIOMETER_PIN 35 
#define LED_PIN 26 

void setup() {
 Serial.begin(9600); 
 pinMode(LED_PIN, OUTPUT); 
} 
void loop() {
 
 int putValue = analogRead(POTENTIOMETER_PIN); 
 int brightness = map(putValue, 0, 4095, 0, 255); 
 analogWrite(LED_PIN, brightness);
 
}