#pragma GCC optimize "-Og"
#include "ArduinoTrace.h"

volatile byte a,b=5;

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);
  byte i=0;
  while(i<10)
  {
    //a=a+2;  //pasar a assembly ¿como se hace?

    asm volatile(
      "lds r24, a \n"
      "subi r24,-2 \n"   //como no hay adi se usa subi, r24 <-- r24 -(-2) <--> r24+2
      "sts a, r24" 
      :
      :
      :"r24"
    );

    i++;
  }
  DUMP(a);
}

void loop() {
  // put your main code here, to run repeatedly:

}