Does anyone know how to cut 2 liters coke bottles to make wind mobile?

[Dianne H]

When you go to craft fairs people have made wind mobiles out of two liter plastic pop bottles , they put a whole in the lid and one thru the bottom, using the long bottom part of a cloths hanger they put in thru the center to hang it, they are cut kinda half moon about 1 inch apart, then they bend them outward, just can not find how to make them, takes very little wind to move them and they are as pretty, some put tape around out side, some puts flags , flowers in side... sure could use help with this..Thanking you in advance