Smooothness

[DSMan195276]

`_Limit 60` will give you the smoothest, though you can't get it perfect. The gist of the problem is that the QB64 window is rendered at 60 FPS, and every time you call `_Display` you're queuing another frame to be displayed in the window. If you queue too many frames then some of them have to be dropped and the pixels will skip a spot. If you queue them too slowly then at some point QB64 will have to display the same frame twice and they'll appear to get stuck.