//defining ledpin. Setting a value for aduino to use as the pin number.
int ledpin = 7;

//defining minimum brightness value for arduin to use
int minbrightness = 0;

//defining LED brightness value for arduino to use
int brightness = 1;

//defining max brightness,
int maxbrightness = 250;

//inc/dec value
int inc = 5;


void setup()
{


pinMode(ledpin, OUTPUT);
}

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

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

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