Arduino Bluetooth Control RC Car

#include<SoftwareSerial.h>
 
SoftwareSerial BT(2,3);
char innum;
int motSpeedPin=9;
int rightMotA=5;
int rightMotB=6;
int leftMotA=7;
int leftMotB=8;
int headLedRight=9;
int headLedLeft=10;
int motSpeed=255;
int ledPower=0;
 
void chanhololicon(char innum);
 
void setup()
{
  Serial.begin(9600);
  BT.begin(9600);
}
 
void loop()
{
  if(Serial.available())
  {
    innum=Serial.read();
    Serial.println("OK.");
    chanhololicon(innum);
  }
}
 
void chanhololicon(char innum)
{
   if(innum=='a')//Go forward
 {
  digitalWrite(rightMotA,HIGH);
  digitalWrite(rightMotB,LOW);
  digitalWrite(leftMotA,HIGH);
  digitalWrite(leftMotB,LOW);
 }
 else if(innum=='b')//back
 {
  digitalWrite(rightMotA,LOW);
  digitalWrite(rightMotB,HIGH);
  digitalWrite(leftMotA,LOW);
  digitalWrite(leftMotB,HIGH);
 }
 else if(innum=='c')//right
 {
  digitalWrite(rightMotA,HIGH);
  digitalWrite(rightMotB,LOW);
  digitalWrite(leftMotA,LOW);
  digitalWrite(leftMotB,HIGH);
 }
 else if(innum=='d')//left
 {
  digitalWrite(rightMotA,LOW);
  digitalWrite(rightMotB,HIGH);
  digitalWrite(leftMotA,HIGH);
  digitalWrite(leftMotB,HIGH);
 }
 else if(innum=='e')//stop
 {
  digitalWrite(rightMotA,LOW);
  digitalWrite(rightMotB,LOW);
  digitalWrite(leftMotA,LOW);
  digitalWrite(leftMotB,LOW);
 }
 else if(innum=='f'&&ledPower==0)//headled(on)
 {
  digitalWrite(headLedRight,HIGH);
  digitalWrite(headLedLeft,HIGH);
  ledPower++;
 }
 else if(innum=='f'&&ledPower==1)//headled(off)
 {
  digitalWrite(headLedRight,LOW);
  digitalWrite(headLedLeft,LOW);
  ledPower--;
 }
 else if(ledPower>1&&ledPower<0)
 {
  ledPower=0;
 }
 }