Umm, well thats a very general question, but i guess the first step is to download scratch by going to the homepage and click on Download the latest version of scratch
If you have already done that, open up scratch and just play around with the blocks. if you don't understand what some of the blocks do, right click on the block and click help
Offline
First, you have to download the latest version of Scratch by going to the homepage of this website. Then, double click the Scratch icon on your desktop. Once it's loaded, start off by using the sprite that's already been made for you (the Scratch cat.) Sprites are the things, characters, shapes etc. that you add "scripts" to. Scripts are the coloured blocks at the left of the screen that you use to control what the sprite does. To add a script to a sprite, just drag it from the list at the left of screen into the grey area.
Here's an example of a script which makes the sprite move when the arrow keys are pressed:
[blocks]<when[ up arrow ]key pressed>[/blocks]
[blocks]<point in direction( 0[/blocks]
[blocks]<move( 10 )steps>[/blocks]
The script tells the computer that every time the up arrow key is pressed, the sprite must point upwards and move 15 steps. If you still don't understand, just click the support button on the website.
Happy Scratch-ing!
Offline