Need VBA code (macro) for Microsoft Word

VBA code needs to take a MS document of one font and change the document so that three different fonts (must be able to choose which fonts and their style) are applied to the entire document making each sentence a different font in groups of three and repeated throughout the document. Each sentence needs to be separated from the one before it and the one after it with a line space above and below.

See attached file for a sample.

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