5mm red and green LED (common cathode) module

// Arduino test code:
int redpin = 11; // select the pin for the red LED
int bluepin = 10; // select the pin for the blueLED
int val;
 
void setup () {
  pinMode (redpin, OUTPUT);
  pinMode (bluepin, OUTPUT);
  Serial.begin (9600);
}
 
void loop () {
 for(val=255;val>0;val--) {
   analogWrite (11, val);
   analogWrite (10, 255 - val);
   delay(5);
 }
 for(val=255;val<255;val++) {
    analogWrite (11, val);
    analogWrite (10, 255 - val);
   delay(5);
 }
}