4.3.B - Press Picture

4.3.B - Press Picture

• We continue our investigation into the buttons on the front of the micro:bit

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Step 2 Load the Code

Again, notice this code does not have a forever loop! Instead, it uses event handlers to react to specific input, in this case, pressing a button.

Even though we're just turning on a single pixel at a time we'll still call this a Picture because we are using the show leds function and can draw an image on the entire matrix if we want to.

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Step 3 Test it Out!

• Press the A Button, then press the B Button. You'll get one LED in the matrix to light up with each button press.
• Try pressing the buttons rapidly, alternating between A and B. What happens?
• The micro:bit may be slow to switch between the two LEDs since we're using the show leds function, and we've learned that it adds a slight delay when it runs.

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