to pair up and communicate with one another using a serial communication in the Arduino

I am trying to do use two bluetooth modules to control an LEDs.  I am using HC05 as master and another as slave.  I can get the two bluetooth module to pair up and communicate with one another using a serial communication in the Arduino IDE.  Now what I want to do is to use a push pins to turn on and off an LEDs.  Here is my set up for the loop and void set up.  I attached also the code that I am using for the bluetooth. ============================================================= void loop() { if(digitalRead(left_arrow_pin) == HIGH) { // seems like left arrow button was pressed // so we clear all the pixels first clear_all_pixels(); // and then we show the left arrow left_arrow(); } else if(digitalRead(right_arrow_pin) == HIGH) { // seems like right arrow button was pressed // so we clear all the pixels first clear_all_pixels(); // and then we show the right arrow right_arrow(); } else if(digitalRead(stop_sign_pin) == HIGH) { // seems like stop sign button was pressed // so we clear all the pixels first clear_all_pixels(); // and then we show the stop sign stop_sign(); } } ==================================================================== void setup() { //setting the button pins we defined above as inputs pinMode(left_arrow_pin, INPUT); pinMode(right_arrow_pin, INPUT); pinMode(stop_sign_pin, INPUT); //initializing the led strip strip.begin(); strip.show(); }