Guide To All Scratch Blocks

Motion

move () steps

This block will make your sprite move a certain amount of steps, in the direction that the sprite is facing.

turn cw () degrees

This block will make your sprite turn a certain amount of degrees clockwise.

turn ccw () degrees

This block will make your sprite turn a certain amount of degrees anti-clockwise.

point in direction ( )

This block can be used to make your sprite face different directions.

go to x: () y: ()

This block can be used to make sprites go to different positions.

go to [ v]

This can be used for a sprite to go to another sprite/the mouse pointer.

glide () secs to x: (0) y: (0)

This block makes a sprite glide to a certain position.

set/change x/y by () :: motion

These blocks can make sprites move.
(x/y position/direction :: motion)
These blocks will report the position of sprites.

Looks

say/think () for (2) secs :: looks

These blocks make speech/thought bubbles show on the sprite, ‘saying’/'thinking' things for a certain amount of time.

say ()

These blocks make speech/thought bubbles show on the sprite, ‘saying’/'thinking' things.

show/hide :: looks

These blocks make sprites show and hide.

switch backdrop/costume to [ v] :: looks

These blocks switch the backdrops and the costumes.

change [graphic v] effect by ()

These blocks will change graphic effects e.g. changing the colour of the sprite.

set [graphic v] effect to ()

These blocks will set graphic effects to a certain number.

clear graphic effects

This block will clear graphic effects.

change size by ()

This block will change the size of the sprite.

set size to () %

This block will set the sprite's size.

go to front/back layer :: looks

This block will make the sprite go to the front or back layer.

go forward/backward () layers :: looks 

This block will make the sprite go to forward/backward layers.

(costume/backdrop number/name :: looks)

This will report the costume/backdrop's number/name.

(size)

This will report the sprite's size.

Note: This guide is not finished yet, but I will be finishing it soon.

Nice! I think this is a good idea!

This is not what this forum is for though. The wiki pages give lots of help on the blocks and hopefully the help Scratch provides within a project will reappear at some point. The tutotrial projects also cover most of the basic blocks.

Great that you want to help but the right way is to let those needing help post questions and respond where you have something useful to add.

Sound

play sound [ v] until done

This block will play sounds on projects.

stop all sounds

This block will stop all sounds.

play drum ( v) for (0.25) beats

This block will play drums.

play note ( v) for (0.5) beats

This block will play instrument notes.

set instrument to ( v)

This block will set the music instrument that the noteblocks will play.

(volume/tempo :: sound)

These blocks will report the volume/tempo of the sound.

change tempo by ()

This block can be used to change the tempo.

set tempo to () bpm

This block will set the tempo to your amount of bpm.

change volume by ()

This block will change the volume of the sounds in the sound editor.

set volume to () %

This block will set the volume of the sounds in the sound editor.

Pen

erase all :: pen

This block will erase all pen.

pen down/up :: pen

Pen down will make the pen start, pen up will make the pen stop.

set pen color to [#af4cbf]

This block will set the pen colour.

change pen color by ()

This block will change the pen colour.

Events
No scripts can work without hat blocks, because hat blocks decide when the script runs. Most hat blocks are events blocks.

when green flag clicked :: control

Starts scripts when the green flag is clicked to start the project.

when [ v] key pressed :: control

Starts scripts when a certain key is pressed.

when this sprite/stage clicked :: control :: hat

Starts scripts when sprite or stage is clicked.

when backdrop switches to [ v] :: control

Starts scripts when backdrop switches to a certain backdrop.

when [loudness/timer v] > () :: control

Starts scripts when the loudness/timer is over a certain number.

when I receive [ v] :: control

Starts scripts when a broadcast is received.

broadcast [ v] :: control

Sends broadcasts to other sprites/stage.

Control

wait () secs :: events

This block makes the scripts of code wait a certain amount of seconds.

repeat () :: events

end

This block makes scripts repeat.

forever :: events

end

This block will make scripts repeat until all of the scripts stop.

if <> then :: events

end

This will make scripts run if (<boolean>).

if <> then :: events

  

else

end

This is the same as the previous block but you can use this block to make something else happen if the boolean is false.

It's great that you want to help out your fellow Scratchers!

But there is no need for a guide like this - it's all covered in the Scratch Wiki

https://en.scratch-wiki.info/wiki/Blocks

You can help best here by looking for topics that describe a scripting problem and trying to fix it. You could also help by pointing folks to the Scratch Wiki for block descriptions - maybe in your forum signature