int brightness11 = 0;
int brightness10 = 0;
int brightness9 = 0;

void setup() 
{
pinMode(11, OUTPUT);
pinMode(10, OUTPUT);
pinMode(9, OUTPUT);
}

void loop() 
{
for (brightness11 = 0; brightness11 <=255; brightness11 +=5)
{
analogWrite (11, brightness11);
delay(30);
}  
for ( brightness10 = 255; brightness10 >=0; brightness10 -=5)
{
analogWrite (10, brightness10);
delay(40);



}

}