Making a part of a vocal from chorus to a sound jingle. - repost

Get the start of the chorus in the attached link to become a jingle: [login to view URL] The start of the chorus goes like this: "Lai lai lai - Boom" I want this to be a catchy sound. It might be the piano or guitar, depending on what you think is best. The jingle should match the sentence "Buy and sell". That means it should look like this: "Buy (lai) and (lai) sell (lai) - Boom. Try to see if you can make a cool effect on the" boom ", not too strong but clear. This should be quite easy since you already got the melody. Your job is to add a good sound to it.