#define LED 2
#define VERT_PIN A2
#define HORZ_PIN A1
#define SEL_PIN  2

int light = 0;
int up_down = 50;

void setup() {
  // put your setup code here, to run once:
  pinMode(LED, OUTPUT);

  pinMode(VERT_PIN, INPUT);
  pinMode(HORZ_PIN, INPUT);
  pinMode(SEL_PIN, INPUT_PULLUP);
}

void loop() {
  // put your main code here, to run repeatedly:
  int horz = analogRead(HORZ_PIN);
  int vert = analogRead(VERT_PIN);
  if (vert < 300) {
    light = light + up_down;
  }
  if (vert > 700) {
    light = light - up_down;
  }
  if (horz > 700) {
    light = light + up_down;
  }
  if (horz < 300) {
    light = light - up_down;
  }
  // Serial.println(String(light));

  if (light > 500 || light < 0){
     light = 0;
  }
  analogWrite(LED, light);
  delay(100);

}