Arduino pro micro serial pass through

#include <Wire.h>




void setup() {
  Wire.begin(8);                // join i2c bus with address #8
  Wire.onReceive(receiveEvent); // register event
  Wire.onRequest(requestEvent);
  Serial.begin(9600);           // start serial for output
  Serial1.begin(250000);

  delay(3000);
  Serial.println("hello");

}

void loop() {
  delay(500);
  while(Serial1.available()){
    Serial.print("THERE IS INCOMING");
    Serial.write(Serial1.read());
  }
  //Serial1.write(8);
  Serial1.write(114);
  Serial.println("Still running");

}

void receiveEvent(int howMany) {

  Serial.print("size of data: ");
  Serial.print(howMany);

  uint8_t prefix = Wire.read(); //first byte


  switch(prefix) {


    case 0xAA : {
     Serial.print(". string : ");
     while (0 < Wire.available()) { // loop through all but the last
        Serial.write(Wire.read());         // print the character
     }
     Serial.println();
     break;
    }

    case 0x55: {

      Serial.print(". binary : ");
       Serial.print(prefix);
      Serial.print(" ");
        while (0 < Wire.available()) { // loop through all but the last
          int x = Wire.read();         // receive byte as an integer
          Serial.print(x, BIN);         // print the integer
          Serial.print(" ");
       }
       Serial.println();
       break;
    }
    default:{
      Serial.print(". other : ");
      Serial.print(prefix);
      Serial.print(" ");
      while (0 < Wire.available()) { // loop through all but the last
          int x = Wire.read();         // receive byte as an integer
          Serial.print(x, BIN);         // print the integer
          Serial.print(" ");
       }
      Serial.println();
    }
  }
}

void requestEvent() {

  Serial.println("requested");
}