IoT 아두이노 0421 - LED_RGB(gogo2)

// LED control value
#define OFF 0
#define RED 0x01
#define GREEN 0x02
#define BLUE 0x04

int pin_GND = 11;
int pin_LED[3] = {8, 9, 10};
int a,i;

void setup() {
pinMode(pin_GND, OUTPUT); //GOUND
pinMode(pin_LED[0], OUTPUT); //R_LED
pinMode(pin_LED[1], OUTPUT); //G_LED
pinMode(pin_LED[2], OUTPUT); //B_LED
digitalWrite(pin_GND, LOW);
}
void loop (){
for(i=0;i<4;i++){if(i>=3)i=4;LED_control(i);delay(2000);LED_control(0);delay(100);}
LED_control(0);delay(2000);
}
void LED_control(uint8_t da)
{
digitalWrite(pin_LED[0], da & 0x01);
da >>=1;
digitalWrite(pin_LED[1], da & 0x01);
da >>=1;
digitalWrite(pin_LED[2], da & 0x01);
}