Hi there,
And Welcome here…
No such thing as Bad English…
Do you have a “While Serial” in Setup function? If so then It waits until the serial port is connected before continuing.
Comment that out and flash again.
HTH
GL 
PJ 
In Arduino, “while(Serial)” means a loop that will continue to run until the serial communication is established and ready to receive or send data; essentially, it waits for the serial port to be active before proceeding with the code within the loop.