How to bold the first three letters of every word in a word and highlight the bolded text gradually?

This is a combination of two ideas Bionic Reading and Speed Reading(Pointer Reading) which are not mine and I am thinking of a free project in which people can paste text and have it bold the first three letters of all the words in a sentence and then gradually highlight only the bolded words in each sentence with color with the bold part of upto 3 words highlighted simultaneously and this project if it works can help others to read faster and I had previously tried to highlight the first three letters of each word in a sentence for a few hours but failed,

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Have a Great Day.