Here are a few examples of sentences using a semicolon for your reference.
My mom had to buy potatoes, tomatoes, onions and capsicums; liquid detergent, body wash, hand wash and fabric softener; bread, butter and jam on her way home.
My brother had his final review today; he seems to have done it well.
I have watched F.R.I.E.N.D.S; I also like Glee.
The dress we picked was available in different colours; therefore, we decided to pick one for each of us.
Philip had to make the presentation today; otherwise, he would have to wait another week until he is given a chance.