# User Guide This section illustrates how to create the various [**Behavior Tree**](/ai-tree/basic/behaviour-tree.md) assets within Unity. Behavior Trees are essentially the Is processor and can make decisions and execute various branches based on the outcome of those decisions. Now an example of creating a simple bot will be shown: ### Creating Behavior Tree Behavior Trees are essentially the AI's processor and can make decisions and execute various branches based on the outcome of those decisions. Click on the **Assets** tab, then select **Create/Renowned Games/Behavior Tree**

Creating Behavior Tree

{% hint style="info" %} Also you can right-click in the **Project** **Window**, then select **Create/Renowned Games/Behavior Tree** {% endhint %} The new **Behavior Tree** asset will be added to the **Project Window** which you can rename to your desired name.

Behavior Tree Name

### Creating Random Position Task To create [**Random Position**](/ai-tree/nodes/tasks/navmesh/random-position.md) node, we need to go to the desired **Behavior tree** and right-click the context menu. Click on **Create Node/Tasks/NavMesh/Random Position**
To save the position value we need to create [**Blackboard**](/ai-tree/basic/blackboard.md)**.** ### **Creating Blackboard** Click on the **Assets** tab, then select **Create/Renowned Games/Blackboard**

Creating Blackboard

{% hint style="info" %} Also you can right-click in the **Project** **Window**, then select **Create/Renowned Games/Blackboard** {% endhint %} The new **Blackboard** asset will be added to the **Project Window** which you can rename to your desired name.

Blackboard name

### Connecting Blackboard in Behavior Tree To connect **Blackboard** to the **Behavior Tree**, click on the **Behavior Tree** we need and drag the desired **Blackboard** into the **Behavior Tree** inspector window where the **Blackboard** field will be.

Behavior Tree Inspector

{% hint style="info" %} You can also add it by clicking on the field with blackboard and select it from all the blackboards in the project. {% endhint %}

Connecting Blackboard in Behavior Tree

### Creating Keys for Blackboard In the **Blackboard**, we create a **Key** with the vector type and call it *position*. To create a **Key**, click on the **New Key** tab.

Creating new Key

In the window that opens, select the **Key** type.

Selecting Key types

An example of how it should turn out:

Creating position Key

In the **Random Position** node inspector window, specify your new **Key.**

Assigning new Key in Task

### Creating Move To Task So that our character can approach the generated position, we will create [**Move To**](/ai-tree/nodes/tasks/navmesh/move-to.md) node. To create **Move To** node, we need to go to the desired **Behavior tree** and right-click the context menu. Click on **Create Node/Tasks/NavMesh/Move To**

Creating Move To Task

In the **Move To** node inspector window, specify *position* **Key.**

Assigning new Key in Task

### Creating Wait Task To create a small delay, we will create [**Wait**](/ai-tree/nodes/tasks/common/wait.md) node. To create **Wait**, we need to go to the desired **Behavior tree** and right-click the context menu. Click on **Create Node/Tasks/Common/Wait**

Creating Wait Task

As in **Move To Task**, we add the *position* **Key** In field Wait time specify 3 seconds.

Filling Wait Time field

{% hint style="info" %} If you don't want to create a **Key** in the **Blackboard**, then you can click on the flag next to the field and enter your fixed value. {% endhint %} ### Creating Sequencer

Now our tree looks like this.

To link our years we need to add [Sequencer](/ai-tree/nodes/composite/sequencer.md). Executes child nodes alternately. To create **Sequencer**, we need to go to the desired **Behavior tree** and right-click the context menu. Click on **Create Node/Tasks/Composites/Sequencer**

Creating Sequencer

### Linking Nodes To link a node, you must pull the connection from the top or bottom of the node (indicated by a circle) to the center of another node.

Link example

{% hint style="info" %} Connecting nodes in **Behavior Trees** only work by connecting an output to an input (you cannot connect from an input to an output). {% endhint %} We connect the remaining nodes in the same way:

Links example

### Connecting Behavior Tree with GameObject To connect **Behavior Tree** to GameObject, we need to add a component to it Behavior Runner. To do this, go to the inspector window of the necessary GameObject. Clicks Add Component and searches Behavior Runner.
In the Behavior Runner field, connect our created **Behavior Tree.**
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