//defining ledpin. Setting a value for aduino to use as the pin number.
#define ledpin 8

//defining minimum brightness value for arduin to use
#define minbrightness 0

//defining LED brightness value for arduino to use
#define brightness 1

//defining max brightness,
#define maxbrightness 250

//inc/dec value
int inc = 5;


void setup()
{


pinMode(ledpin, OUTPUT);
}

void transition()
{
  if (brightness >= maxbrightness)
    inc = -5;
  else if (brightness <= minbrightness)
    inc = 5
    
}

void ledcolor()
{
analogWrite(ledpin, brightness);  
}

void loop()
{
  transition();
  ledcolor();  
}