  function typeCommand() {
            const currentCommand = commands[commandIndex];
            const typingElement = document.getElementById('typing-command');
            
            if (isDeleting) {
                typingElement.textContent = currentCommand.substring(0, charIndex - 1);
                charIndex--;
            } else {
                typingElement.textContent = currentCommand.substring(0, charIndex + 1);
                charIndex++;
            }
            
            let typeSpee