How could you sew and create WITHOUT fabric? I guess you can cut up the clothes you are wearing but then you would become chilly. You can cut up your sheets on your bed but then you would have a lot of pieces in all the same color and texture AND it is very uncomfortable to sleep on a mattress without linens. You could also cut up the curtains on the windows but then you can't cut up your clothes too because then the neighbors would see you naked sitting at your machine. Go ahead. You need to buy fabric. It is a necessity.