If you would like to see how I made the Spikes on the gown you can see how to make them here
Step 1: HAND Wind bobbin, be mindful not to pull tightly.
Step 2: Load Bobbin in machine
Step 3: Load black thread in machine
Step 4: Make the tension button on your machine go as high as you can go
Step 5: Set the straight sewing setting on your machine
Step 7: Load Material and start slowly making circles