// port 'E'
    DDRE = 0x04;    // 0=In  1=In  2=Out 3=In  4=In  5=In  6=In  7=In  
    PORTE = 0x00;    // 0=Low 1=Low 2=Low 3=Low 4=Low 5=Low 6=Low 7=Low

    // --- USART0_RX irq ---
    // --- USART0_TX irq ---
    // --- main loop ---
    sei();
    for (;;)
    {
        //sleep(); // ... add your application code here
        PORTE = 0xFF;<<
        _delay_ms(1000);
        PORTE = 0x00;<<
        _delay_ms(1000);
    }
    return 0;