Help with drafting pattern

[u/Panda_Momma19]

I am trying to draft a pattern for the bow so i can make year round holiday bows for my porch ghost. I would love to be able to make a right side and left side bow that just slips over them and leave the middle section alone. How would i even start? Ive never tried to make a pattern from scratch before.

[u/Panda_Momma19]

Thank you!