pxt-calliope/docs/reference/js/lessons/magic-logo/activity.md
2016-04-01 16:22:47 -07:00

1.0 KiB

magic logo activity

show an image that points up when the logo is up.

~avatar avatar

@video td/videos/magic-logo-0

Welcome! This tutorial will help you display an arrow pointing toward the logo! Let's get started.

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Using the accelerometer sensor, the BBC micro:bit can detect when the logo is oriented up. We call that the logo up event. We will use input->on logo up to register an event handler that will run when the logo up event happens.

input.onLogoUp(() => {
}) // ***

When the BBC micro:bit goes logo up, the code nested under the basic->on logo up function will run. Let's add a line of code to plot an image in there.

input.onLogoUp(() => {
    basic.showLeds(`
. . # . .
. # # # .
# # # # #
. . # . .
. . # . .
`, 400) // ***
})

Run your code and try to turn around the BBC micro:bit to see the logo up event in action!

~avatar boothing

Excellent, you're ready to continue with the challenges!

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