我正在尝试运行这段代码:packagemainimport("github.com/faiface/pixel""github.com/faiface/pixel/pixelgl")funcrun(){cfg:=pixelgl.WindowConfig{Title:"MyFirstprogram",Bounds:pixelgl.R(0,0,800,600)}window,err:=pixelgl.NewWindow(cfg)iferr!=nil{panic(err)}for!window.Closed(){win.Update()}}funcmain(){pixelgl.Run(run