#include <Arduino.h>
volatile byte x = 0;  
void exam1() {
    asm volatile (
    "ldi r19, 82\n"
    "L3: ldi r20, 254\n"
    "L2: ldi r21, 254\n"
    "L1: dec r21\n"
    "brne L1\n"
    "dec r20\n"
    "brne L2\n"
    "dec r19\n"
    "brne L3\n"
    "sts %0, r19\n"
    : "=m" (x)   
    :            
    : "r19", "r20", "r21"  
);

}

void setup() {
    // Initialize serial communication
    Serial.begin(9600);

    // Set all PORTB pins as output (if needed)
    DDRB = 0xFF;
}

void loop() {
    // Record starting time
    unsigned long t1 = millis();

    // Perform delay for 1000 ms
    exam1();

    // Record ending time
    unsigned long t2 = millis();

    // Print the time taken by the task
    Serial.print("Time taken by the task: ");
    Serial.print(t2 - t1);
    Serial.println(" milliseconds");
    Serial.println(" -------------");
    Serial.println(x);
    Serial.println(" -------------");
    // Add any other tasks or operations here
    // For example, toggling PORTB as in your original code
    PORTB ^= 0xFF;

    // Delay for 1 second (1000 ms) between tasks
    delay(10000);
}