pxt-calliope/docs/lessons/blink/challenges.md

blink blocks challenges

Coding challenges for the blink tutorial

Before we get started

Complete the blink activity and your code will look like this:

basic.forever(() => {
    led.plot(2, 2)
    basic.pause(500)
    led.unplot(2, 2)
    basic.pause(500)
})

Challenge 1

Let's display a "smiley face" on the screen! We'll start by plotting the eyes.

Add plot(1,1) and plot(3,1) under plot(2,2) ; then add unplot(1,1), unplot(3,1) and unplot(2,2) after pause. When you're ready, don't forget to run your code to try it out!

basic.forever(() => {
    led.plot(2, 2)
    led.plot(1, 1)
    led.plot(3, 1)
    basic.pause(500)
    led.unplot(2, 2)
    led.unplot(1, 1)
    led.unplot(3, 1)
    basic.pause(500)
})

Challenge 2

Let's add the code to plot the mouth by using plot and unplot to the following coordinates: (1,4), (2,4) and (3,4). When you're ready, don't forget to run your code to try it out!

basic.forever(() => {
    led.plot(2, 2)
    led.plot(1, 1)
    led.plot(3, 1)
    led.plot(1, 4)
    led.plot(2, 4)
    led.plot(3, 4)
    basic.pause(500)
    led.unplot(2, 2)
    led.unplot(1, 1)
    led.unplot(3, 1)
    led.unplot(1, 4)
    led.unplot(2, 4)
    led.unplot(3, 4)
    basic.pause(500)
})

Challenge 3

Let's keep using plot to convert the mouth into a smiley face.

0 0 0 0 0
0 1 0 1 0
0 0 1 0 0
1 0 0 0 1
0 1 1 1 0

Challenge 4

Let's make it blink a bit faster. To do so, we need to reduce the amount of time used in pause to 100 milliseconds.

Challenge 5

Create your own image by changing the coordinates in plot and unplot!