prop ring_radius, blank_radius, dot_radius, dot_color;prop message1, message2, message1font, message2font;prop logo;obj "tpcal" {  bgfill = fillstyle {    SetColor(bgcolor);    Rect(x,y,w,h);        /* logo */    Bitmap(x+((w-198)>>1), 5, 198,200, logo);        /* Messages */    SetColor(fgcolor);    SetFont(message1font);    Text(x + ((w-240)>>1), (h>>1) + 30, 1, 1, message1);    SetFont(message2font);    Text(x + 40, (h>>1) + 90, 1, 1, message2);  };  PGTH_P_USER = fillstyle {    Rect(x-ring_radius,y-ring_radius,ring_radius*2+1,ring_radius*2+1);    SetColor(0xFFFFFF);    SetLgop(PG_LGOP_XOR);    Rect(x-ring_radius,y-ring_radius,ring_radius*2+1,ring_radius*2+1);    SetLgop(PG_LGOP_NONE);        SetColor(bgcolor);    Rect(x-blank_radius,y-blank_radius,blank_radius*2+1,blank_radius*2+1);    SetColor(dot_color);    Rect(x-dot_radius,y-dot_radius,dot_radius*2+1,dot_radius*2+1);  };  bgcolor = 0x336699;  ring_radius = 20;  blank_radius = 15;  dot_radius = 3;  dot_color = 0xFFFF00;  message1 = "Welcome to TuxScreen!";  message2 = "To calibrate your touchscreen, firmly and accurately tap the yellow\ndot in the center of each white target.";  logo = LoadBitmap("data/tuxcal_logo.bmp");  fgcolor = 0xFFFFFF;  message1font = Font("Helvetica",24,0);  message2font = Font("Helvetica",18,0);}