Read the target
The challenge gives you a decimal number between 1 and 63.
Interactive binary playground
Switch the bits.
Build the number.
Turn six bits on or off until their values add up to the target. The same interface can run in a browser or control the original ESP8266-and-LED teaching device.
Most significant bit
Least significant bit
Use the buttons or press keys 1–6
That is correct.
How it works
Every position is a power of two.
Choose the bits
Each switch contributes 32, 16, 8, 4, 2 or 1 when it is on.
Make the sum
When the active values add up to the target, you have its binary representation.