Block Glossary

Agents

Block	Name	Usage	Image
Create Each Do	create [_] [▼](s) each do	create [_] [▼](s) each do is used to populate Spaceland with agents and then run a stack of code individually for each agent. This can be useful for making many agents and setting different traits for each.
Delete	delete	Deletes the agent executing the stack of code.
Delete Everyone	delete everyone	delete everyone is used to delete all agents from Spaceland.
Delete Agent	delete agent [_]	delete agent [_] is used to delete a specific agent from Spaceland.
Scatter	scatter	scatter is used to scatter an agent to a random location in SpaceLand.
Scatter Everyone	scatter everyone	scatter everyone is used to scatter all agents in SpaceLand to random locations. Note: if this block is used in an breed tab where more than one agent of that breed exists, each individual agent of this breed will scatter everyone once. For example, if there are five agents of the breed, everyone will be scattered 5 times as each individual agent runs the code.
Take Camera	take camera	take camera changes the camera perspective to be from the point of view of the agent executing the code. can be useful for implementing interactive games from the first-person perspective.
Me	me	me is used to refer to the agent executing the code. This block is often used as a socket in other blocks, such as delete agent [_].
My Parent	my parent	my parent refers to the agent that created the agent that is currently executing the code.
Create	create [_] [▼](s)	create [_] [▼](s) is used to populate Spaceland with agents.

Detection

Block	Name	Usage	Image
Collidee	collidee	collidee is used to refer to the agent that has been collided with when used inside a on collision with [▼] do stack of code. This block is used as a socket in other blocks, such as delete agent [_].
Count Within Steps	count [▼] within [_] steps	count [▼] within [_] steps is used to provide the number of agents of a selected breed that exist within a given step limit in Spaceland.
Count Within Steps With =	count [▼] within [_] steps with [▼] = [_]	count [▼] within [_] steps with [▼] = [_] is used to provide the number of agents of a selected breed AND specific trait that exist within a given step limit in Spaceland.
Nearest Within Steps	nearest [▼] within [_] steps	nearest [▼] within [_] steps is used to refer to the nearest agent of a selected breed that exists within a given step limit in Spaceland.
Nearest Within Steps With =	nearest [▼] within [_] steps with [▼] = [_]	nearest [▼] within [_] steps with [▼] = [_] is used to refer to the nearest agent of a selected breed AND trait that exists within a given step limit in Spaceland.
On Collision With Do	on collision with [▼] do	on collision with [▼] do begins the execution of a stack of code when a collision is detected with a specific type of agent denoted in the drop down selector. The agent collided with is known as the "collidee". This agent can be referenced using the collidee block.

Environment

Block	Name	Usage	Image
Clear Terrain	clear terrain	clear terrain is used to clear the Spaceland of all drawings.
Set World To	set world [▼] to [_]	set world [▼] to [_] is used to set traits of the world in a similar way to agents.
Stamp	stamp [_]	stamp [_] causes the agent to draw a circle on the terrain in the agent's current position, with size corresponding to the size of the agent.
Stamp Grid	stamp grid [_]	stamp grid [_] causes the agent to color one grid square on the terrain in the agent's current color on the agent's current position.
Pen	pen [▼]	pen [▼](s) adjusts the pen tool. If the pen is down, the agent stamps the terrain at each position as it moves. If the pen is up, the agent does not stamp the terrain.
Terrain Color	terrain color	terrain color refers to the color of the terrain that the agent is currently on.
Clock	clock	clock refers to the value of the clock, measured in “ticks”. This value increments by 1 after each iteration of the code. The speed that the clock increments is determined by the value of the engine speed slider. A slider value of n makes the clock tick n times per second. The clock starts at zero when the program is initiated.
Set Clock To	set clock to [_]	set clock to [_] sets the value of clock to some number. Typically, when you reset the clock, you want to start it at 0.
World Trait	world trait: [▼]	world trait: [▼] refers to the value of a selected world trait. World traits can be created by adding a new trait to The World breed in the breed manager (go to The World tab and click on the show traits button. Then, select “add custom trait”). This can be thought of as a “global variable."
The World	The World	The World refers to an agent that represents The World. Can be used as a location to mean the center of SpaceLand, which is (0,0).
Reset Terrain Heights
Terrain Height
Get Patch
Dig
Build
Set Patch To
Interpolate
World Glow Amount
Yank Wide
Stomp Wide
Yank Grid
Stomp Grid
Set Directional Light Intensity
Set Directional Light Color
Set Directional Light
Set World Glow To

Interface

Block	Name	Usage	Image
When Pushed	when [▼] pushed	when [▼] pushed begins a single execution of a stack of code (from top to bottom) when the pushed button widget is pushed. Widgets can be created using the Edit Widgets feature. Note: It is useful to use the ‘when pushed’ with a push button widget when you want to execute a code segment once.
While Toggled	while [▼] toggled	while [▼] toggled executes commands repeatedly while the toggle button widget is turned on. When the toggle button widget is turned off, the commands in this block don’t run. Widgets can be created using the Edit Widgets feature. Note: It is useful to use the ‘while toggled’ block with the toggle button widget if you want the code to execute multiple times until the widget is toggled off.
Hide	hide [▼]	hide [▼] hides a selected widget. Once hidden, you need to use “show” to make it visible again.
Show	show [▼]	show [▼] shows a selected widget. By default, all widgets are displayed to the user.
Set Data Box To	set [▼] data box to [_]	set [▼] data box to [_] assigns a value to a selected data box.
Data Box	[▼] data box	[▼] data box refers to the value of a selected data box. Note: You should use data boxes for numerical values and labels for textual values. One advantage of using a data box is that you can title it.
Set Label To	set [▼] label to [_]	set [▼] label to [_] assigns a value to a selected label. Unlike data boxes, labels do not have a heading and may be assigned text values.
Label	[▼] label	[▼] label refers to the value of a selected label.
Slider Value	[▼] slider value	[▼] slider value refers to the value of a selected slider.
Add Data To Line Graph	Add data to line graph [▼] for [▼] x-axis: [_] y-axis: [_]	Add data to line graph [▼] for [▼] x-axis: [_] y-axis: [_] adds data to a selected series of a selected graph that’s made up of pairs of x-coordinates and y-coordinates. First create a line graph widget using the Widget Editor, and add one or more series as needed.
Clear Line Graph	clear line graph [▼]	clear line graph [▼] removes all existing data on the selected line graph.
Engine Tick Rate
Toggle To For

Keyboard

Block	Name	Usage	Image
Key Held?	[▼] key held?	[▼] key held? is a type of logic block that returns a boolean. A true is returned if a specific key denoted in the drop down is held down in the current tick.
Key typed?	[▼] key typed?	[▼] key typed? is a type of logic block that returns a boolean. A true is returned if a specific key denoted in the drop down is typed in the current tick.

Lists

Block	Name	Usage	Image
Insert Into List At Index
Splice List Into List At Index
Remove Item Number From
Item Number In
Index Of In
Contains
Length Of
List

Logic

Block	Name	Usage	Image
If	if [_]	if [_] takes in comparative statements from the Logic drawer to test for a condition. The agent will only follow commands attached to the hook if the statement is true.
If Else
While
With % Chance
Repeat Times
Yield
Equals
Not		Negates the input. So, if the expression evaluates to true, then returns false. If the expression evaluates to false, then returns true.
Not Equals		Determines whether the two inputs are unequal and returns true or false.
Less Than		Determines if the first input is less than the second input and returns true or false.
Greater Than		Determines if the first input is greater than the second input and returns true or false
Less Than Or Equal To		Determines if the first input is less than or equal to the second input and returns true or false.
Greater Than Or Equal To		Determines if the first input is greater than or equal to the second input and returns true or false.
And		Determines if both the first and second inputs are true. If both are true, then returns true; if one or both of the statements are false, this block returns as false.
Or		Determines if either the first or second input are true. If at least one is true then returns true; else returns false.
True		Returns as true.
False		Returns as false.

Math

Block	Name	Usage	Image
Random To	random [_] to [_]	random [_] to [_] defines the upper and lower bounds of a range from which a random number is generated. The number is generated between and including the set limits.
Pi		Returns the numerical value of pi (3.14159...).
Random Decimal		A random decimal between 0 and 1.
Sum		Returns the sum of two inputs.
Difference		Returns the difference of two inputs.
Product		Returns the product of two inputs.
Quotient		Returns the quotient of two inputs.
Remainder Of		Returns the remainder of the first input divided by the second input.
Sin Cos Tan		Compute the mathematical operations of sine, cosine, or tangent and takes as input a value in degrees.
Arcsin Arccos Arctan		Computes the mathematical operations of arcsine, arccosine, or arctangent and returns a value in degrees.
Sqrt		Returns the square root of the input.
Log		Returns the log (base 10) of the input.
Ln		Returns the natural log of the input.
Power		Returns the value of the first input raised to the power of the second input.
Larger Of And		Returns the larger or smaller value of the two inputs.
Round To Decimal Place(s)		Returns the rounded value of the first input with a specified number of decimal points.
Abs		Returns the absolute value of the input.

Movement

Block	Name	Usage	Image
Forward	forward [_]	forward [_] moves the agent in Spaceland in the heading it is facing. The renderer tweens the movement such that it appears the agent changes location smoothly instead of instantaneous.
Backwards	backwards [_]	backwards [_] moves the agent in Spaceland in the heading opposite that which it is facing. The renderer tweens the movement such that it appears the agent changes location smoothly instead of instantaneous.
Left By Degs	left by [_] degs	left by [_] degs orientates the agent in Spaceland to the left of its original heading by the inputted number of degrees during each Starlogo clock tick.
Right By Degs		right by [_] degs orientates the agent in Spaceland to the right of its original heading by the inputted number of degrees during each Starlogo clock tick.
Up		Will move any agent upwards in the “z” direction by the number of steps specified.
Down		Will move any agent downwards in the “z” direction by the number of steps specified.
Face Towards		Turns to face the agent specified.
Teleport To		Instantly moves to the specified coordinate.

Procedures

Block	Name	Usage	Image
Procedure		Defines a grouping of commands to do a particular function. Select “name” and type over it to rename the procedure.
Call		Agent calls a defined procedure to follow from the drop down menu.
Parameter		Returns the value of a selected parameter that has been added in the procedure definition.
Return-Early		Used in a procedure definition to end a procedure early with the option of returning a value.
Call (returns)		Calls a procedure that returns a value.
Block Glossary Category

Sound

Block	Name	Usage	Image
Play Sound		Plays the specified sound.
Sound		Returns the selected sound. You can upload or record your own sounds, or select one from a library of pre-loaded sounds.

Traits

Block	Name	Usage	Image
My		Returns the value of an agent's trait.
Set My To		Sets the selected trait of an agent to the value of the input.
Of		Returns the value of a trait belonging to another agent (such as collidee or my parent).
Set Of To
Color		Returns a particular color or a color at random chosen from the drop down menu.
Color RGB		This block will create a color with an amount of red, green, and blue in it as specified by the input values.
Built-In Shape		Returns a particular built-in shape chosen from the drop down menu.
Uploaded Shape		Clicking on the dropdown menu will open a page in which you can select an uploaded shape you have used previously or choose to upload a new one.
Glow With Intensity
Stop Glowing

Variables

Block	Name	Usage	Image
Value Of		Returns the value of a selected variable.
Set to		Sets the value of a previously existing variable selected from the dropdown menu to the value of the input.
Var is		Creates a variable (a place to store data) in the agent's context with a specified name. You can rename the variable by selecting the “name” text and typing over it. You can also specify what type of variable using the drop down menu. The variable only exists in the stack of code where it is created.

Debugger

Block	Name	Usage	Image
Trait
Assert
Breakpoint
Assert Type of is
Type of is
Breed has trait
Print to JS (value)
Print to JS (condition)