In the 1930's, Swedish artist Oscar Reutersvärd drew and made public a series of what came to be called impossible figures.
Hi va-1930, mumpfampfarhuti wa le Sweden la vuriwaka Oscar Reutersvärd u mpfampfarhute swilo leswi a nga endla leswaku swi tiviwa naswona a swi vitaniwa swifaniso leswi rharhanganeke.