The cat sprite that you can see is the Scratch mascot. If you need an empty Scratch project, you can delete the cat by right-clicking it and then clicking delete.

Add in a new ghost sprite and a suitable Stage backdrop.

Click on Choose a Sprite to open the Sprite Library:

You can search for a sprite, or browse for one by category. Click on a sprite to add it to your project.

Click on Choose a Backdrop in the bottom right-hand corner of the screen to open the Backdrop Library:

You can search for a backdrop, or browse for one by category. Click on a backdrop to add it to your project.

Add code to your ghost sprite so that the ghost appears and disappears forever when the green flag is clicked.

Test and save your project.

First, to give your program a name, type the name of your program in the project name box at the top of the screen:

Then, to save your project, click on File, and then on Save now:

Note: If you are not online or you do not have a Scratch account, you can click on Save to your computer to save a copy of your project.