Controller for 24v LED lightbar driven by IRFZ44 MOSFET

Breath.ino

/*
Breathing Led bar
By: Benargee
*/

int ledPin = 9;      // LED connected to digital pin 9
int count = 2;
int inerval = 1; //interval in miliseconds between loops
int order = 1; //indicates order of decreasing or increasing intensity. 1: increasing -1:decreasing
const int minVal = 1;
const int maxVal = 254;

void setup()
{
  pinMode(ledPin, OUTPUT);   // sets the pin as output
}

void loop()
{
switch (count) {
    case minVal:
      order = 1;
      break;
    case maxVal:
      order = -1;
      break;
  }
  count = count + order;
  analogWrite(ledPin,count);
  delay(10);
}