oppo A83 password problem

Hi how to remove pattern password oppo A83 with NCK cpu MT6763
but not booting not working
Scanning for presents meta ports...
Phone must be off with battery inside.
Please insert USB cable now...
In some phones need to keep VOL- button untill inserting USB cable.
[58]Detected: MTK USB Port (COM58)
\\?\usb#vid_0e8d&pid_0003#5&9498b8c&0&2#{a5dcbf10-6530-11d2-901f-00c04fb951ed}
Starting FACTORY MODE, wait...
If need to make phone factory reset, scroll to line what have EMMC in name and execute.
In some phones factory menu can start after 5-30sec.
All done.