//FADE LED

int j=0;
int i = 1;
 //default
void setup() {
 // put your setup code
// here, to run once:
pinMode(9,OUTPUT);
Serial.begin(9600);
}
void loop() {
 // put your main
// code here, to run repeatedly:
analogWrite(9,j);
delay(5);
j+=i;
if(j>254) i -= 1;
if(j==0) i = 1;
}