... This example illustrates how to expand and contract the clipping region of a layer, without changing the wrapping width of the layer. ... Creating the Colored Squares . ... The basic aim of the changeNow() function is to start expanding the layer if it is fully contracted, or start contracting the layer if it is fully expanded. ... For each layer, it contains the HTML text for an embedded layer that displays the layer's number at a place that will be visible when the layer is fully contracted. ...