I found the receipt from a book, but I changed the ratios of water and oil.
Here is my receipt:
1. Flour: Salt= 1:1 (cup)
2. cooking oil= about 2 table spoon
3. Water= about 1/2 cup (It really depends on how soft that you want to make coils without breaking it. You can add a little bit water one at a time).
Then you can bake it for about 50 minutes in 350f oven.
Make sure to place your piece on the parchment paper before you bake it.
After it cools down, you can paint it with tempera paint and use mod podge to seal it.