Blink an LED

Recommended before this lesson:

Your objective

Observe three LED on/off cycles with a one-second wait in each state.

Translations are draft and need educator review.

Drag blocks from the toolbox into the workspace. Connect statement blocks beneath Start. Use the zoom controls to see your program.

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Run your program to test it. Blocks alone do not earn completion.

Stop ends the current run and keeps the current device state. Reset clears the device and output, keeping blocks.

Virtual LED

Teaching model: external active-high LED on GPIO 2 (HIGH = ON). Real board wiring differs. This simulation does not verify physical firmware.

OFF · Ready · 0 ms

Execution output

Read-only code preview

Connect one Start and all supported blocks with valid values to preview or run.

Editor keyboard and screen reader access has not been verified. The surrounding instructions and controls are keyboard accessible. Practical alternatives: run the preloaded starter program, import/export workspace JSON, or inspect the read-only JavaScript, MicroPython, and C++ code preview.