Your First Script

This is the moment it gets real. You're about to write code that runs inside a multiplayer World. Let's start with the classics — print a message, then spawn something.

Create a Package

Scripts live inside Packages. Let's make one:

1. Open HELIX Studio from the Launcher
2. Go to File → New Package
3. Name it my-first-package
4. Choose Script Package as the type
5. Hit Create

Your Package folder is now set up with the right structure, and a starter script file is waiting for you.

Hello HELIX!

Open the main script file in your Package. Let's make sure everything works:

Blueprint

Blueprint— Hello HELIX! — Print a message on BeginPlayScroll to zoom · Drag to pan · Drag nodes to move

In HELIX Studio, open your Package Blueprint, find Event BeginPlay, and wire it to a Print String node with the message Hello HELIX!.

Lua

-- my-first-package/Server/Index.lua

print("Hello HELIX!")

JavaScript

// my-first-package/Server/Index.js

console.log("Hello HELIX!");

Run your World with the Package loaded. You should see "Hello HELIX!" in the output log. If you do — congratulations, you're a HELIX scripter now.

Spawn an Actor

Printing is great for debugging, but let's do something visible. Here's how to spawn a prop in the World when the script loads:

Blueprint

Blueprint— Spawn a cube actor above the originScroll to zoom · Drag to pan · Drag nodes to move

Drag out from Event BeginPlay, add a Spawn Actor from Class node, set the class to StaticMeshActor, and configure the spawn transform. Then set its mesh to a basic cube.

Lua

-- my-first-package/Server/Index.lua

-- Spawn a cube prop 200 units above the origin
local myProp = Prop(
    Vector(0, 0, 200),           -- location
    Rotator(0, 0, 0),            -- rotation
    "helix::SM_Cube"             -- static mesh asset
)

print("Spawned a cube at: " .. tostring(myProp:GetLocation()))

JavaScript

// my-first-package/Server/Index.js

// Spawn a cube prop 200 units above the origin
const myProp = new Prop(
    new Vector(0, 0, 200),       // location
    new Rotator(0, 0, 0),        // rotation
    "helix::SM_Cube"             // static mesh asset
);

console.log(`Spawned a cube at: ${myProp.GetLocation()}`);

Run the World again. You should see a cube hovering above the ground. It's not much to look at — but it was conjured into existence by your code, in a multiplayer World, running on Unreal Engine 5.

What happened here?

• You created a Package to hold your scripts
• You wrote a server-side script that runs when the Package loads
• You spawned an Actor (a physical object in the World)

Server-side scripts run on the server and control the authoritative game state. Later you'll learn about client-side scripts for UI, effects, and input handling. But the server is where the real game logic lives.

What's next?

You've got a World with objects and scripts. Now let's publish it so other people can see what you've built.