help for a programme

i have a arduino Project drawcar robot i find this page http://quai-lab.com/draw-bot/v2/

to control the car by sound but i dont know how i make the programme i have only the programme of servomoteurs :( :( :(

this is the pro example that i was found https://www.youtube.com/watch?v=3KjEkFvux7Q

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how can i pay for you

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