Give a better warning if Layout.start() is not called
Give a better warning if Layout.start() is not called

ManiacalLabs/BiblioPixel,rec/BiblioPixel,ManiacalLabs/BiblioPixel,ManiacalLabs/BiblioPixel,ManiacalLabs/BiblioPixel,rec/BiblioPixel,rec/BiblioPixel,rec/BiblioPixel