คิอผมไใ่เข้าใจ ตรงที่ รับค่า a แล้วจะให้ a ทำงานไปเรื่อยๆ จนกว่าจะรับค่าอื่นมา แล้วถึงเปลี่ยนไปทำงานค่าอื่น จะต้องเขียนแบบไหนครับ
ผู้รู้ช่วยที


#include <SoftwareSerial.h>
SoftwareSerial mySerial (11,10);  //TX, RX

#define RED 9
#define GREEN 13
#define BLUE 12
//int fadetime = 200 ;
void setup()
{
  mySerial.begin(9600);
  pinMode (RED,OUTPUT);
  pinMode (GREEN,OUTPUT);
  pinMode (BLUE,OUTPUT);
  digitalWrite(RED,LOW);
  digitalWrite(GREEN,LOW);
  digitalWrite(BLUE,LOW);

}


void loop()
{
if (mySerial.available()>0)
  {

      char data = mySerial.read();
      if (data=='r')
      {
      digitalWrite(RED,HIGH);
      digitalWrite(GREEN,LOW);
      digitalWrite(BLUE,LOW);
      }
      
    else if(data == 'g')
{
    digitalWrite (RED,LOW);
    digitalWrite(GREEN,HIGH);
    digitalWrite(BLUE,LOW);
  }
      else if(data == 'b')
{
    digitalWrite (RED,LOW);
    digitalWrite(GREEN,LOW);
    digitalWrite(BLUE,HIGH);
  }
      else if(data == 'y')
{
    digitalWrite (RED,HIGH);
    digitalWrite(GREEN,HIGH);
    digitalWrite(BLUE,LOW);

  }
      else if(data == 's')
{
    digitalWrite (RED,LOW);
    digitalWrite(GREEN,HIGH);
    digitalWrite(BLUE,HIGH);

  }
      else if(data == 'm')
{
    digitalWrite (RED,HIGH);
    digitalWrite(GREEN,LOW);
    digitalWrite(BLUE,HIGH);

  }
      else if(data == 'w')
{
    digitalWrite (RED,HIGH);
    digitalWrite(GREEN,HIGH);
    digitalWrite(BLUE,HIGH);

  }
      else if(data == 'a')
{

      
        {
        //r
       digitalWrite(RED,HIGH);
       digitalWrite(BLUE,LOW);
       digitalWrite(GREEN,LOW);
       delay(500);
      
      //b
      digitalWrite(RED,LOW);
      digitalWrite(BLUE,HIGH);
      digitalWrite(GREEN,LOW);
      delay(500);
      
      //g
      digitalWrite(RED,LOW);
      digitalWrite(BLUE,LOW);
      digitalWrite(GREEN,HIGH);
      delay(500);
      
      //y
      digitalWrite(RED,HIGH);
      digitalWrite(BLUE,HIGH);
      digitalWrite(GREEN,LOW);
      delay(500);

      //c
      digitalWrite(RED,LOW);
      digitalWrite(BLUE,HIGH);
      digitalWrite(GREEN,HIGH);
      delay(500);
      
      //m
      digitalWrite(RED,HIGH);
      digitalWrite(BLUE,LOW);
      digitalWrite(GREEN,HIGH);
      delay(500);

      //y
      digitalWrite(RED,HIGH);
      digitalWrite(BLUE,HIGH);
      digitalWrite(GREEN,HIGH);
      delay(500);
        }
       delay(500);  
}
  
       else
{data == 'x';
     digitalWrite (RED,LOW);
     digitalWrite(GREEN,LOW);
     digitalWrite(BLUE,LOW);

  }  
  
  }
}