Home Automation with voice control Using Arduino UNO, HC-05

int re1=8;
int re2=9;
int re3=10;
int re4=11;
char val;
void setup() {
  // put your setup code here, to run once:
   pinMode(re1,OUTPUT);
   pinMode(re2,OUTPUT);
   pinMode(re3,OUTPUT);
   pinMode(re4,OUTPUT);
  digitalWrite(re1, HIGH);     
  digitalWrite(re2, HIGH);     
  digitalWrite(re3, HIGH);     
  digitalWrite(re4, HIGH);

Serial.begin(9600);
}

void loop() {
  while (Serial.available() > 0)
  {
  val = Serial.read();
  Serial.println(val);
  }
  if(val == 'a')
  {
digitalWrite(re1,HIGH);
  }
else if(val == 'b')
  {
digitalWrite(re2,HIGH);
  }
else if(val == 'c')
  {
digitalWrite(re3,HIGH);
  }
else if(val == 'd')
  {
digitalWrite(re4,HIGH);
  }
else if(val == 'A')
  {
digitalWrite(re1,LOW);
  }
else if(val == 'B')
  {
digitalWrite(re2,LOW);
  }
else if(val == 'C')
  {
digitalWrite(re3,LOW);
  }
else if(val == 'D')
  {
digitalWrite(re4,LOW);
  }
else if (val == 'E'){
digitalWrite(re1,LOW);
digitalWrite(re2,LOW);
digitalWrite(re3,LOW);
digitalWrite(re4,LOW);
}
else (val == 'e');
{
digitalWrite(re1,HIGH);
digitalWrite(re2,HIGH);
digitalWrite(re3,HIGH);
digitalWrite(re4,HIGH);
}
}