DIY PRO X Mini Arduino Code

#include <Keyboard.h>

const int buttonS = 7;
const int buttonD = 8;

int led1 = 3;
int led2 = 4;

void setup() {

  pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);

  pinMode(buttonS, INPUT_PULLUP);
  pinMode(buttonD, INPUT_PULLUP);

  Keyboard.begin();

}

void loop() {

  if (digitalRead(buttonS) == LOW)
  {
    Keyboard.press('s');
    digitalWrite(led1, LOW);
  }
  else
  {
    Keyboard.release('s');
    digitalWrite(led1, HIGH);
  }
  if (digitalRead(buttonD) == LOW)
  {
    Keyboard.press('d');
    digitalWrite(led2, LOW);
  }
  else
  {
    Keyboard.release('d');
    digitalWrite(led2, HIGH);
  }

}