private void btnClick(object sender, EventArgs e)
        {
            idleTime.Stop();
            form_Main _Mainform = new form_Main();

            _Mainform.Show();
            this.Hide();
        }
        //EVENT BUTTON CLICK
        private void btnClick(object sender, EventArgs e)
        {
            BunifuTileButton btn = (BunifuTileButton)sender;

            switch (btn.Name)
            {
            case "btn_Back":
                form_WelcomePage WelcomePageForm = new form_WelcomePage();
                WelcomePageForm.Show();
                this.Hide();
                break;

            default:
                form_Main _Mainform = new form_Main();
                _Mainform.currentFloor = this.currentFloor;
                _Mainform.Show();
                this.Hide();
                _Mainform.usertype = btn.LabelText;
                break;
            }
        }