pxt-calliope/olddocs/lessons/snowflake-fall/activity.md

snowflake fall blocks activity

design a blinking rectangle animation.

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Welcome! This tutorial will teach how design a snowfall animation. Let's get started!

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Let's start by creating a forever loop that will allow us to repeat the show LEDs code. Any code in the forever loop will repeat in the background... forever.

basic.forever(() => {
    basic.showLeds(`
        . . . . .
        . . # . .
        . # # # .
        . . # . .
        . . . . .
        `)
    basic.showLeds(`
        . . . . .
        . . . . .
        . . . . .
        . . . . .
        . . . . .
        `)
})

The next step is to add two show LEDs blocks inside the forever loop to repeat an animation.

basic.forever(() => {
    basic.showLeds(`
        . . . . .
        . . # . .
        . # # # .
        . . # . .
        . . . . .
        `)
    basic.showLeds(`
        . . # . .
        . # . # .
        # . . . #
        . # . # .
        . . # . .
        `)
})

Run your code in the simulator or download it to your BBC micro:bit to see what happens!

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

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