// LED whipper. changing Brightness of a LED for Labels 
// 
int led_pin = 9; // led is connected to Arduino digital pin 5
// used as Static test
int led_brightness = 5; // can be value between 0 and 255

void setup(){
    pinMode(led_pin, OUTPUT);
}
// Increase and decrese LEd Brightness 
void loop(){
   analogWrite(led_pin,10);

delay(1000);

analogWrite(led_pin,220);

delay(500);
    analogWrite(led_pin, 300);
delay(1000);

analogWrite(led_pin,400);

delay(500);
    analogWrite(led_pin,5);
}