base64 scanlines

Black Version
data:image/gif;base64,R0lGODlhAQACAPAAAAAAAAAAACH5BAEAAAEALAAAAAABAAIAAAICRAoAOw==

White Version
data:image/gif;base64,R0lGODlhAQACAPAAAP///wAAACH5BAEAAAEALAAAAAABAAIAAAICRAoAOw==

Black Version @2x
data:image/gif;base64,R0lGODlhAQAEAPAAAAAAAAAAACH5BAEAAAEALAAAAAABAAQAAAIDBBIFADs=

White Version @2x
data:image/gif;base64,R0lGODlhAQAEAPAAAP///wAAACH5BAEAAAEALAAAAAABAAQAAAIDBBIFADs=