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Your complete toolbox

Before you build, get to know your tools. The AT-66BL app groups blocks into color-coded categories on the left edge. This page is your reference - come back to it any time you forget what a block does.
Color = category. Blue is flight, yellow is events, orange is control and variables, light-blue is sensing, green is math. The colors match Scratch, so if you’ve used Scratch before, you already know your way around.
Color legend mapping AT-66BL block categories to their colors

The block color legend - learn the colors and you can find any block fast

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Fly (blue) - make the drone move

The Fly category holds every movement command. These are unique to the drone.
AT-66BL Fly category blocks

The Fly blocks - take off, land, and every movement command

The vertical move, horizontal move, and turn blocks use exact distances and degrees - perfect for precise shapes. That’s a big upgrade over time-based flying.

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Events (yellow) - start and signal

Events are how programs begin and how parts of a program talk to each other.
AT-66BL Events category blocks

The Events blocks - start your program and broadcast messages

Every program starts with a when 🏳 clicked hat block. Snap your flight blocks right underneath it.

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Control (orange) - loops and decisions

Control blocks are the logic of your program - how it repeats, waits, and decides.
AT-66BL Control category blocks

The Control blocks - loops, waits, and if-then decisions

A repeat loop is your best friend for shapes: “repeat 4 times: move forward, turn 90°” flies a perfect square with just a few blocks.

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Sensing (light blue) - the timer

Sensing lets your program react to time.
AT-66BL Sensing category blocks

The Sensing blocks - timer and reset timer

Pair timer with wait until or if-then to build time-based routines - like “do a trick every 5 seconds.”

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Operators (green) - math and logic

Operators do math and compare values. You drop them inside other blocks.
AT-66BL Operators category blocks

The Operators blocks - arithmetic, random, comparisons, and logic

pick random makes programs feel alive: turn (pick random 1 to 4) × 90 degrees sends the drone a surprising direction every run.

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Variables (orange) - store values

A variable is a named box that holds a number you can read and change.
AT-66BL Variables category blocks

The Variables blocks - make, set, change, show, and hide values

When you click Make a Variable, this dialog appears - name it and choose the scope:
AT-66BL New Variable dialog

Naming a new variable

Lists work the same way with Make a List:
AT-66BL New List dialog

Naming a new list

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My Blocks - build your own

My Blocks lets you package a sequence of blocks into one custom block you name yourself. Click Make a Block, give it a name (like do_a_flip), and reuse it anywhere.
AT-66BL Make a Block dialog

Making your own custom block

Custom blocks are how pros keep programs tidy. Build a square block once, then a “dance” that calls square three times reads like plain English.
You can name all seven categories, and you know where to find take off, repeat, when 🏳 clicked, Make a Variable, and Make a Block.

Next: your first AT-66BL program

Build the “hello world” of AT-66BL - take off, hover, land - with the green flag.