1. A method of producing an instruction set, wherein the instruction set conforms to the Scalable Vector Graphics specification, and the time containers are ‘page’ child elements of a ‘pageSet’ parent element, for rendering on a graphic display, the instruction set comprising a sequence of time containers to be rendered, each said-of the time containers containing at least one timed element to be displayed on the graphic display, wherein the instruction set obeys a rule prohibiting a-each of the time containers from referencing, in a condition of an event associated with the time container, the content of a different one of the time containers, said method comprising the steps of: adding an event-associated attribute to a particular one of the time containers being a page element, the event-associated attribute being associated with an event, the event having a condition which references a target element adding the target element to the particular time container as a child element of the page element, the target element initiating the event; and providing a correspondence between the event-associated attribute and an effect on the display of a different one of the time containers trigger, the correspondence triggering the effect when the event occurs of beginning the display of the different time container, wherein the different time immediately follows the particular time container in the sequence, in a manner consistent with the rule.