#define RGB 15
#define PB 6

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  pinMode(RGB,OUTPUT);
  pinMode(PB, INPUT);
}

void loop() {
  int a=digitalRead(PB);
  if(a==0){
    digitalWrite(RGB, HIGH);
  }
  else{
    digitalWrite(RGB, LOW);
  }

}