Open a new Scratch project and look at the range of sprites and backdrops that you can use. Spend some time thinking about your shop idea.

Choose a Backdrop or paint your own backdrop.

• A backdrop from the Scratch library, or a plain coloured backdrop

Choose a Sprite and add or paint extra scenery sprites.

Add more scenery.

• A desk, counter, or window to sell from
• A shelf or bookcase to put items on — you could Paint this on the backdrop

Add a sprite to represent the seller.

You could choose:

• A person or non-player character such as a shopkeeper, farmer, or librarian
• A machine such as a vending machine, jukebox, or cash register

Click on your seller sprite and add a broadcast block. Create a new message called next customer.

when flag clicked
+ broadcast (next customer v)

Create a new script for your seller sprite to say Next customer please when they receive the broadcast next customer.

when I receive [next customer v] 
say [Next customer please!] for (2) seconds