Basic syntax

Scratch commands are specified using the text equivalent (see example below).

Find a detailed reference on our Docs page.

                                when flag clicked
move (10) steps
say (hello) for (2) seconds
                            

Specifying values

Values are specified with round brackets, for example

                                set x to (100)
                            

Conditions

Conditions are specified used angled brackets <> for example

                                if <mouse down> then
  change x by (10)
                            

Drop down fields

Drop down fields are specified with square brackets [] regardless of whether they appear on the Scratch block with square or rounded corners. The image will have the correct corners depending on the block, for example.

                                go to [random position]
                            

Indentation

When indenting use either two spaces or a tab for each level of indentation. It is important to be consistent with your indentation otherwise it will create issues when the code is being parsed.

This code uses two spaces for each level of indentation

                                repeat (4)
  move (10) steps
  if <key [space] pressed> then
    turn right (90) degrees
                            

Reporter blocks

Reporter blocks are specified by placing the name of the block in any value field

                                y position
                            

Greater than comparison

The greater than comparison is specified as "gt" and not ">"

                                repeat until <(x position) gt (100)>
  move (10) steps
                            

Less than comparison

The Less than comparison is specified with "lt" instead of "<"

                                if <(y position) lt (-140)> then
  go to [random position]
                            

Blocks with graphics

Scratch blocks with graphics are specified as shown in the code below. The text ":flag", ":right" and ":left" are automatically replaced with the the corresponding graphic.

                                when flag clicked
turn right (90) degrees
turn left (-20) degrees
                            

Specifying colors

When needing to specify colors simply state the Color, Saturation and Brightness values as shown in the code. Students can use the values to recreate the desired color.

                                if <touching color (c10 s20 b100)> then
  hide
                            

Mystery directive

The Mystery directive is a great way to tests student's understanding of the material being taught.

Value fields, condition fields and entire blocks can be left blank by using the "mystery!" directive.

                                if <mystery! touching color (c10 s20 b100)> then
  hide
                            

Empty C blocks

If presenting the material using an iterative approach or to tests student's knowledge you leave a space where a block would have been by using the "space" instruction.

                                if <key [space] pressed?> then
  space
  space
  space
else
  move (10) steps
                            

Highlighting a block

Blocks can be highlighted by prefixing them with the "highlight" directive. When the color option is "Color Outline" or "Full Colour" a red chevron is used to point to the highlighted block.

When "Black & White is the color option the outline of the block is darkened.

                                when I start as a clone
show
go to x (pick random (-235) to (235)) y (170)
repeat until < (yposition) lt (-170)>
  highlight!change y by (-5)
delete this clone
                            

Auto hints

Auto hints list the block categories of the blocks used to build an instruction. This is very useful when the color option is "Black & White and students may need assistance locating the blocks

To enable Auto Hints just tick the check box on the convert options

                                when flag clicked
go to x: (0) y: (0)
pen down
repeat (4)
  move (100) steps
  turn right (90) degrees
                            

Converting multiple scripts

Multiple scripts can be converted simultaneously by separating the scripts in the editor with 5 or more dashes ":-----"

When multiple scripts are converted a "zip" file will also be produced containing the converted images.

                                when flag clicked
hide
create clone of [myself]
-----
when I start as a clone
go to x (-240) y (0)
show
                            

Manual hints

Manual hints can be used to provide special instructions to students on a per block basis.

After the block text simple append a tilda followed by the desired text e.g. "move (10) steps ~ what happens when the value is increased"

Note that when provided manual hints always override Auto HInts.

                                when flag clicked
hide
set size to (70) %
forever
  create clone of [myself]
  wait (1) seconds ~ Is this long enough?
                            

Specify the filename for the image

An image name can be specified for each script by preceding the script with a filename directive following two dashes, for example "-- filename: figure_1.jpg":

NOTE: We support both ".jpg" and ".png" extensions. Images generated with a ".png" extension will have a transparent background automatically.

                                -- filename: apple_sprite.png
when flag clicked
set [Score] to (0)
set [Apples Missed] to (0)
hide
set size to (70) %
forever
  create clone of [myself]
  wait (1) seconds
                            

MyBlocks

MyBlocks can be defined using the "define!" directive. This must be the first block in the script

The defined block can then be used in subsequent scripts (using the multi-script separator).

NOTE:The defined block with not validate in the editor and will appear as an error unless you mark it with the "myblock!" directive. It will however convert successfully.

                                define!create (x) balls
repeat (x)
  create clone of [Ball]
-----
when flag clicked
myblock!create (10) balls
                            

Vanity blocks

Vanity blocks can be specified by prefixing the line with the "vanity!": directive.

The system will choose a random color from the block categories (not including the extensions). If you want the block to be a specific block category color you can append the category to the vanity directive for example "vanity-looks!": or "vanity-motion!":

                                vanity!happy birthday
                            

micro:bit display []

To specify what to display use an "1" for on and and "0" for off in a row by row (row 1 to row 5) configurations separated by commas for example display [01010,10101,10001,01010,00100]
                                display [01010,10101,10001,01010,00100]
                            

Category directives

Many of the blocks in the MakeyMakey, micro:bit, Lego EV3, Lego Boost, Lego WeDo 2.0 and Force & Acceleration extensions share identical signatures which make it impossible to differentiate them unless a category directive is provided. All the blocks listed below should be specified with a category directive e.g. "boost!" otherwise the wrong block may be matched.

makey!when [SPACE] key pressed

microbit!when [moved]
microbit!when tilted [any]
microbit!tilt angle [front]

ev3!distance

boost!motor [A] position
boost!when tilted [any]
boost!tilt angle [up]
boost!set light color to (50)

wedo!set light color to (50)
wedo!when tilted [any]
wedo!distance
wedo!tilted [any]
wedo!tilt angle [up]

fa!when [shaken]
fa!when tilted [any]
fa!tilted [any]
fa!tilt angle [front]

                                boost!set light color to (50)
seperator
wedo!set light color to (50)
                            

Scale factor

When creating blocks to print for unplugged activities. Use the scale_factor instruction to ensure that all blocks have the same size connectors. The scale factor can be specified on the first script and all subsequent scrips, in a multi-script conversion, will use the same scale factor. Prefix the script with "-- scale_factor: " to specify the desired scale factor. NOTE: value must be an integer

If you are unsure what scale factor to use. Convert the longest block first and then check the scale factor it was created with on the My Account/Conversions page and use that scale factor on subsequent conversions.

The scale factor instruction can only be used if you have signed up for the Educator Plus plan.

                                -- scale_factor: 3
when flag clicked
                            

Basic syntax

Scratch commands are specified using the text equivalent (see example below).

Find a detailed reference on our Docs page.

                                        when flag clicked
move (10) steps
say (hello) for (2) seconds
                                    

Specifying values

Values are specified with round brackets, for example

                                        set x to (100)
                                    

Conditions

Conditions are specified used angled brackets <> for example

                                        if <mouse down> then
  change x by (10)
                                    

Drop down fields

Drop down fields are specified with square brackets [] regardless of whether they appear on the Scratch block with square or rounded corners. The image will have the correct corners depending on the block, for example.

                                        go to [random position]
                                    

Indentation

When indenting use either two spaces or a tab for each level of indentation. It is important to be consistent with your indentation otherwise it will create issues when the code is being parsed.

This code uses two spaces for each level of indentation

                                        repeat (4)
  move (10) steps
  if <key [space] pressed> then
    turn right (90) degrees
                                    

Reporter blocks

Reporter blocks are specified by placing the name of the block in any value field

                                        y position
                                    

Greater than comparison

The greater than comparison is specified as "gt" and not ">"

                                        repeat until <(x position) gt (100)>
  move (10) steps
                                    

Less than comparison

The Less than comparison is specified with "lt" instead of "<"

                                        if <(y position) lt (-140)> then
  go to [random position]
                                    

Blocks with graphics

Scratch blocks with graphics are specified as shown in the code below. The text ":flag", ":right" and ":left" are automatically replaced with the the corresponding graphic.

                                        when flag clicked
turn right (90) degrees
turn left (-20) degrees
                                    

Specifying colors

When needing to specify colors simply state the Color, Saturation and Brightness values as shown in the code. Students can use the values to recreate the desired color.

                                        if <touching color (c10 s20 b100)> then
  hide
                                    

Mystery directive

The Mystery directive is a great way to tests student's understanding of the material being taught.

Value fields, condition fields and entire blocks can be left blank by using the "mystery!" directive.

                                        if <mystery! touching color (c10 s20 b100)> then
  hide
                                    

Empty C blocks

If presenting the material using an iterative approach or to tests student's knowledge you leave a space where a block would have been by using the "space" instruction.

                                        if <key [space] pressed?> then
  space
  space
  space
else
  move (10) steps
                                    

Highlighting a block

Blocks can be highlighted by prefixing them with the "highlight" directive. When the color option is "Color Outline" or "Full Colour" a red chevron is used to point to the highlighted block.

When "Black & White is the color option the outline of the block is darkened.

                                        when I start as a clone
show
go to x (pick random (-235) to (235)) y (170)
repeat until < (yposition) lt (-170)>
  highlight!change y by (-5)
delete this clone
                                    

Auto hints

Auto hints list the block categories of the blocks used to build an instruction. This is very useful when the color option is "Black & White and students may need assistance locating the blocks

To enable Auto Hints just tick the check box on the convert options

                                        when flag clicked
go to x: (0) y: (0)
pen down
repeat (4)
  move (100) steps
  turn right (90) degrees
                                    

Converting multiple scripts

Multiple scripts can be converted simultaneously by separating the scripts in the editor with 5 or more dashes ":-----"

When multiple scripts are converted a "zip" file will also be produced containing the converted images.

                                        when flag clicked
hide
create clone of [myself]
-----
when I start as a clone
go to x (-240) y (0)
show
                                    

Manual hints

Manual hints can be used to provide special instructions to students on a per block basis.

After the block text simple append a tilda followed by the desired text e.g. "move (10) steps ~ what happens when the value is increased"

Note that when provided manual hints always override Auto HInts.

                                        when flag clicked
hide
set size to (70) %
forever
  create clone of [myself]
  wait (1) seconds ~ Is this long enough?
                                    

Specify the filename for the image

An image name can be specified for each script by preceding the script with a filename directive following two dashes, for example "-- filename: figure_1.jpg":

NOTE: We support both ".jpg" and ".png" extensions. Images generated with a ".png" extension will have a transparent background automatically.

                                        -- filename: apple_sprite.png
when flag clicked
set [Score] to (0)
set [Apples Missed] to (0)
hide
set size to (70) %
forever
  create clone of [myself]
  wait (1) seconds
                                    

MyBlocks

MyBlocks can be defined using the "define!" directive. This must be the first block in the script

The defined block can then be used in subsequent scripts (using the multi-script separator).

NOTE:The defined block with not validate in the editor and will appear as an error unless you mark it with the "myblock!" directive. It will however convert successfully.

                                        define!create (x) balls
repeat (x)
  create clone of [Ball]
-----
when flag clicked
myblock!create (10) balls
                                    

Vanity blocks

Vanity blocks can be specified by prefixing the line with the "vanity!": directive.

The system will choose a random color from the block categories (not including the extensions). If you want the block to be a specific block category color you can append the category to the vanity directive for example "vanity-looks!": or "vanity-motion!":

                                        vanity!happy birthday
                                    

micro:bit display []

To specify what to display use an "1" for on and and "0" for off in a row by row (row 1 to row 5) configurations separated by commas for example display [01010,10101,10001,01010,00100]

                                        display [01010,10101,10001,01010,00100]
                                    

Category directives

Many of the blocks in the MakeyMakey, micro:bit, Lego EV3, Lego Boost, Lego WeDo 2.0 and Force & Acceleration extensions share identical signatures which make it impossible to differentiate them unless a category directive is provided. All the blocks listed below should be specified with a category directive e.g. "boost!" otherwise the wrong block may be matched.

makey!when [SPACE] key pressed

microbit!when [moved]
microbit!when tilted [any]
microbit!tilt angle [front]

ev3!distance

boost!motor [A] position
boost!when tilted [any]
boost!tilt angle [up]
boost!set light color to (50)

wedo!set light color to (50)
wedo!when tilted [any]
wedo!distance
wedo!tilted [any]
wedo!tilt angle [up]

fa!when [shaken]
fa!when tilted [any]
fa!tilted [any]
fa!tilt angle [front]

                                        boost!set light color to (50)
seperator
wedo!set light color to (50)
                                    

Scale factor

When creating blocks to print for unplugged activities. Use the scale_factor instruction to ensure that all blocks have the same size connectors. The scale factor can be specified on the first script and all subsequent scrips, in a multi-script conversion, will use the same scale factor. Prefix the script with "-- scale_factor: " to specify the desired scale factor. NOTE: value must be an integer

If you are unsure what scale factor to use. Convert the longest block first and then check the scale factor it was created with on the My Account/Conversions page and use that scale factor on subsequent conversions.

The scale factor instruction can only be used if you have signed up for the Educator Plus plan.

                                        -- scale_factor: 3
when flag clicked