int red = 3;
int green = 5;
int blue = 6;


void setup() {
  // setup code
pinMode(red, OUTPUT);
pinMode(green, OUTPUT);
pinMode(blue, OUTPUT);
}

void loop() {
  // loop code 

for( i= 0; i<=500; i++)
{
  analogWrite(blue, 255);
  delay(i);
  analogWrite(blue, 0);
  delay(i);
}
for



}