const byte blue = 11, orange = 10;
#define DUTY 25
#define BLUE_DELAY    18                      //18 x 25mS Duty = 450mS delay
#define ORANGE_DELAY  35                      //40 x 25mS Duty = 875mS delay
unsigned long previousMillis = 0;
int blueCount = 0, orangeCount = 0;
bool blueState = 0, orangeState = 0;

void setup() {
  pinMode(blue, OUTPUT);
  pinMode(orange, OUTPUT);
}

void loop() {
  
  unsigned long currentMillis = millis();
  
  if(currentMillis - previousMillis >= DUTY){       //Creates our 25mS non-Blocking timer
    previousMillis = currentMillis;                 //Resets timer for next 25mS delay MANDATORY or timer won't work!
    blueCount++;                                    //Counters for delay periods greater than DUTY period
    orangeCount++;                                  // longhand "orangeCount = orangeCount + 1"
      if(blueCount >= BLUE_DELAY){                    //True when count = delay count
        blueCount = 0;                                //Reset to zero for next count delay period
        digitalWrite(blue, (blueState = !blueState)); //Method to toggle LED ON/OFF with ! (NOT)
      }
      if(orangeCount >= ORANGE_DELAY){
        orangeCount = 0;
        digitalWrite(orange, (orangeState = !orangeState));
      }
  }
}