Someone grammatically fix this please . . .

Answer:
First, we need to make our cosutumes; For example, last year I took an old white sheet my parents had and cut out some holes in it so that I could be a ghost that year.
Explanation:
Changing the words can make it sound smooth and make it grammatically correct.
You can choose either one:
First, we made our costumes. For example, last year I got an old, white sheet that my parents had and cut holes into it so I could be a ghost.
First, we made our costumes. For example, last year I got and old, white sheet my parents had and cut holes into it so I could be a ghost.