You will need:
Two or three Halloween shapes. I used pumpkins with two different faces, one silly face and one happy face and a ghost. I placed the pattern at the top-pumpkin, ghost, pumpkin, ghost. Then we began the pattern at the bottom-pumpkin, ghost, pumpkin, ghost…then asked the child “what comes next”?
Once they understand this simple pattern, you can begin to make it more complicated-pumpkin, pumpkin, ghost/pumpkin, pumpkin, ghost
pumpkin, pumpkin, ghost, ghost
silly pumpkin,ghost,happy pumpkin
happy pumpkin, silly pumpkin, ghost
happy pumpkin, silly pumpkin, ghost, silly pumpkin, happy pumpkin
This last pattern is quite complicated but every year I have at least one child that is able to follow it.