#define RED 7
#define BLUE 8

int redState = LOW;
int blueState = LOW;
unsigned long redPrev = 0;
unsigned long bluePrev = 0;

void setup()
{
 pinMode(RED, OUTPUT);
 pinMode(BLUE, OUTPUT);
}

void loop()
{
 unsigned long redCurr = millis();
 unsigned long blueCurr = millis();
 if (redCurr - redPrev >= 1000) {
   redPrev = redCurr;
   redState = !redState;
 }
 if (blueCurr - bluePrev >= 250) {
   bluePrev = blueCurr;
   blueState = !blueState;
 }

 digitalWrite(RED, redState);
 digitalWrite(BLUE, blueState);
}