The different colored blocks stand for different types of code.

Blue: This category is the motion category. The motion category focuses on moving your sprite around the screen. If you want to make a sprite move forward, you can use a Change X By 10 Block!

Purple: This category is the looks category. The looks category focuses on changing the appearances of sprites and backdrops. You could use a Switch Costume Block to change the appearance of a sprite.

Pink: This category is the sound category. The sound category focuses on making sprites make sounds. You could use a Play Sound Until Done block to play a sound.

Yellow: This category is the events category. Every project needs an event. That's because this project makes things happens when interactions are made. If you want to make a program, snap your code onto a When Green Flag Clicked Block to start the project when the green flag is clicked.

Light Orange: This category is the control category. The control category is all about how much a sprite should do something or how long a sprite should stay still. If you drag a Wait 1 Second Block into your program, the program will wait 1 second before it starts.

Teal: This category is the sensing category. This category is about checking if an object is touching another object so it can make something happen.

Green: This category is the operator category. It can make randomizers with it's Pick Random Block or even do math!

Dark Orange: This category is the variables category. You can make a variable such as score for a score game. Let's say if you jump over something, the score will increase!

Red: This category is the my blocks category. Here you can make your own block. But first you have to code what that block means.

Hopefully this gives you an answer to the question “what do different blocks mean”? Happy Scratching!

Why red for More Blocks though?
Also, guides aren't meant to be here since there are too many, but yeah.
Also, Operators have had string related blocks.

I think more blocks look red but if they aren't they are a light pinkish color

MasteGamez wrote:

I think more blocks look red but if they aren't they are a light pinkish color

Looks more-so a slightly-brighter purple in 3.0's editor to be honest.

Yeah you can have your own thoughts. I just personally think it's bright pink or red. OH I think I get it. I meant “my blocks” instead of “more blocks” but in that case yeah more blocks are purple.

Hello! It's great that you want to help out other Scratchers. However, I think we have enough guides in the forums at the moment. Please feel free to welcome new Scratchers on the group welcoming topic or on individual topics created by New Scratchers.

Other places that can always use more helpful Scratchers like you, are the "Help With Scripts“ and ”Questions About Scratch" areas - please use them as designed, by responding to topics created by folks with problems to solve

Finally, a really good place for Scratch guides is the Scratch Wiki - check it out and see if it's something you might like to work on. They have a number of guides - and great organization.