#include <Arduino_APDS9960.h>

void setup() {

  Serial.begin(9600);
  while (!Serial);

  if (!APDS.begin()) {
    Serial.println("Error initializing APDS9960 sensor!");
  }
  Serial.println("Detecting gestures ...");
}
void loop() {
  if (APDS.gestureAvailable()) {
    int g1 = APDS.readGesture();
     if(g1==GESTURE_UP){
        Serial.println("Detected UP gesture");
        Serial.println("계속하세요");
        delay(500);
        while(!APDS.gestureAvailable());
          int g2 = APDS.readGesture();
          if(g2==GESTURE_DOWN){
          Serial.println("Detected DOWN gesture");
          Serial.println("계속하세요");
          delay(500);
          while(!APDS.gestureAvailable());
            int g3 = APDS.readGesture();
            if(g3==GESTURE_LEFT){
            Serial.println("Detected LEFT gesture");
            Serial.println("계속하세요");
            delay(500);
            while(!APDS.gestureAvailable());
              int g4 = APDS.readGesture();
              if(g4==GESTURE_RIGHT){
              Serial.println("Detected RIGHT gesture");
              Serial.println("계속하세요");
              delay(500);}
              else{
                Serial.println("실패");}}
                else{
                Serial.println("실패");}}
                else{
                Serial.println("실패");}}
                else{
                Serial.println("실패");
                }}}