How to have multiple ProductIDs in an order MySQL

I'm pretty new to all of this. I have database set up for an online store with the following tables: Customer,Product,Order,Order_Details and Sales. What I'm having trouble with is the Order_details table. For example if a person orders more than one product I can't insert more than one productID. Sorry if I explained this weirdly, any help is appreciated! I'm pretty new to all of this. I have database