**''[AO:''** ''[[animationrules|]]'' **,** ''<#>[[picturename|]],[[xy|, ]]'' **'']''** Animation Overlay Simple (two state) animation definition. The animation is composed only of two states - the first is the original state of the base picture, the second is the result overlaying the base picture by ''[[picturename|]]'' at the position ''[[xy|, ]]''. If  the '''' is preceded by a # character, the '''' overlay picture will be mirrored. The overlay picture, if stored in a TVL picture library, can be a different mode picture (having different "transparent" and "no change" pixels). As the whole animation consists of only the two end states, the possibilities of the ''[[animationrules|]]'' parameter are limited. You can use it to name the two end states with individual action names, but - for example - you can define an animation name for cyclically changing the two states - as in a blinking light.