DGX-670 Drum Roll

[Janmac]

I enjoy playing "Moanin" on my Yamaha dgx 670 trying to imitate the style of Art Blakey and his Jazz Messengers. After the intro I start the rhythm with the right pedal. How I would love to also have a drum roll at that point. Does anyone know how I can program that for the left pedal?
Greetings from the Netherlands