A system and s method for broadcasting to a plurality of client side devices over a network, such as the Internet, using visual layers for assembly in a media broadcast. In response to receiving input for simulating the media broadcast defined by content objects and arrangement of each layer in the simulation, the content objects for each of a plurality of the layers in a different live stream are transmittied to each of the client side devices and design parameters defining the arrangement of the layers in the simulation are transmittied to each of the client side devices. Each of the client side devices may be adapted to assemble the layers of a media broadcast according to the content objects and the design parameters of the transmissions so that the content objects and design of the media broadcast assembled at each of the client side devices substantially matches that of the simulated media broadcast.