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The article focuses on a new model for algorithm animation over the world wide web. Algorithm animation helps the end user to understand algorithms by visually following their step-by-step execution, a complex task if relying on the textual program alone. There is a strong educational component associated with algorithm animation. It can be used by students individually or in class demonstrations. Algorithm animation is also a powerful software tool that can assist the algorithm designer in code debugging and in demonstrating a complex algorithm to a larger audience than merely specialists in the particular area of the algorithm. A new model, called Mocha, has been introduced for providing algorithm animation over the World-Wide Web. Mocha is a distributed model with a client-server architecture that optimally partitions the software components of a typical algorithm animation system and leverages the power of the Java language, an emerging standard for distributing interactive platform-independent multimedia applications across the Web.