Goods Shed Light Fader

/*The street and track lights fader cycle for the goods shed.
  This sketch created and copywrite by Gary C. Granai https://www.facebook.com/gary.granai and is included in the
  Arduino For Model Railing Library at https://steamtraininfo.com/arduino-projects
  You are free to use this sketch and amend it for your own personal use as long as these credits remain intact.
  Using it in any manner or form for commercial purposes is prohibed.*/

#define streetSwitch A5
#define streetEast 6 /* fading lights must be attached to pwm pins. Since there are only 6 pwm pins
on a nano/uno, to fade more lights use TLC  5940   https://steamtraininfo.com/arduino-projects/arduino-tlc5940
*/
#define streetWest 9
#define trackEast 10
#define trackWest 11
int brightness = 0;    //
int fadeAmount = 5;    // how many points to fade the LED by . will be slowed by a delay in the loop.
int val = 0;

// the setup routine runs once when you press reset:
void setup() {
  // declare pwm pins to be output:
  pinMode(streetEast, OUTPUT);
  pinMode(streetWest, OUTPUT);
  pinMode(trackEast, OUTPUT);
  pinMode(trackWest, OUTPUT);

  pinMode(streetSwitch, INPUT);
}

//Routine
void loop() {
lights();
}

//Cycles
//******************************************************************
  void lights(){
  val = digitalRead(streetSwitch);   // read the signal from the daily cycle

  if (val == HIGH) {
    analogWrite(streetEast, brightness);// set the brightness of pin :
analogWrite(streetWest, brightness);
analogWrite(trackEast, brightness);
analogWrite(trackWest, brightness);


    brightness = brightness + fadeAmount;  // change the brightness for next time through the loop:
    delay(200);// slows the fade time }

    if (brightness >= 255) { // keeps the LEDS bright once they reach max brigthness
      brightness = 255;
    }
  }

  if (val == LOW) {
    analogWrite(streetEast, brightness);// set the brightness of pin 9:
analogWrite(streetWest, brightness);
analogWrite(trackEast, brightness);
analogWrite(trackWest, brightness);



    brightness = brightness - fadeAmount;  // change the brightness for next time through the loop:
    delay(100);// slows the fade time }
    if (brightness <= 0) {
      brightness = 0;
    }
  }
}