Scratch

What things folder?

archmage's way works but there is another way.

create this block:

[blocks]
<when green flag clicked>
<forever>
<change x by( <{ x vel }> )>
<change y by( <{ y vel }> )>
[/blocks]

Then you can do something like:

[blocks]
<when green flag clicked>
<forever>
<if><key[ left arrow ]pressed?>
<change{ x vel  }by( -1)>
<if><key[ up arrow ]pressed?>
<change{ y vel }by( 1)>
[/blocks]

archmage wrote:

Go to Choose sprite from file->things->friction marble.

It's one of the many sprites that scratch comes with.

I though you were talking about a game!