#define RMP 10
#define RMN 11
#define LMP 12
#define LMN 13

void setup() {
  pinMode (LMP, OUTPUT);
  pinMode (LMN, OUTPUT);
  pinMode (RMP, OUTPUT);
  pinMode (RMN, OUTPUT);
  Serial.begin(9600);
}

void loop() {
  if (Serial.available() <= 0) return;

  String str = Serial.readString();
  motor((uint8_t)strtol(str.c_str(), NULL, 2));
}

void motor(uint8_t states) {
  digitalWrite(LMP, (states >> 0) & 0x01);
  digitalWrite(LMN, (states >> 1) & 0x01);
  digitalWrite(RMP, (states >> 2) & 0x01);
  digitalWrite(RMN, (states >> 3) & 0x01);
}