Full paper in PDF:
$%M. de Guzmán, Chaos made visual, Rev. Mat. Univ. Complut. Madrid 9 (1996), supplementary, 141–147.%$

In this paper we show how the main properties of chaos can be fully visualized at the light of a very easy to handle object, the tent function. Although very concrete, this case is representative of a very large number of examples, with more or less the same properties.