pxt-calliope/olddocs/lessons/glowing-pendulum/tutorial.md

glowing pendulum block tutorial

The glowing pendulum changes the screen brightness based on the acceleration measured on the BBC micro:bit.

Rebuild the game!

The blocks have been shuffled! Put them back together so that...

• all LEDs are turned on
• the BBC micro:bit repeats code forever that
  • reads the acceleration along the y axis,
  • calculate the absolute value of the acceleration
  • scales down the acceleration value by a factor of 4
  • uses the scaled value to set the screen brightness

basic.showLeds(`
    # # # # #
    # # # # #
    # # # # #
    # # # # #
    # # # # #
    `)
basic.forever(() => {
    let acceleration = input.acceleration(Dimension.Y);
    acceleration = Math.abs(acceleration);
    acceleration = acceleration / 4;
    led.setBrightness(acceleration)
});