Facebook ad images

We are a car service centre called Dack Motor Group Coventry and are accredited by the RAC as an approved repairer. I want to run a Flash Sale this weekend promoting a 40% discount voucher to encourage new customers to book in via our online booking system or by phone during the next two weeks (until end of February) . I will need 3 images creating, i will provide our company logo etc, to be used on a Facebook carousel-style advert. The sale will start today (as soon as I receive the images and have set up the ad) and end midnight Sunday.

I'm happy to take advice as I have a basic knowledge of running Facebook ads (i have an audience, understand budgets etc) but think i need the following images (that conform to Facebook's policy of minimal text in images):

Image 1 - Flash Sale
Image 2 - 40% off
Image 3 - Book online

Need to get it all done asap pls!