To turn on the white led……!!!

Combination 3 led will give white colour which is not in the board

void setup()
{
    pinMode(PF_1, OUTPUT);   //sets PF1 pin as output(RED LED locate here)
    pinMode(PF_2, OUTPUT);   //sets PF2 pin as output(BLUE LED locate here)
    pinMode(PF_3, OUTPUT);   //sets PF3 pin as output(GREEN LED locate here)
}
void loop()
{
    digitalWrite(PF_1, HIGH);    // Sets PF1 in high state(RED LED on)
    digitalWrite(PF_2, HIGH);    // Sets PF2 in high state(BLUE LED on)
    digitalWrite(PF_3, HIGH);    // Sets PF2 in high state(GREEN LED on)
}