63 lines
1.1 KiB
Markdown
63 lines
1.1 KiB
Markdown
# strobe light activity
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Develop shapes with a for loop.
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### ~avatar avatar
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### @video td/videos/strobe-light-0
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Welcome! This guided tutorial will teach how to develop shapes with a for loop. Let's get started!
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### ~
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Create a `for loop` that will loop from 0 to 4 to indicate the x-coordinates of the micro:bit display.
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```blocks
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for (let i = 0; i < 5; i++) {
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}
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```
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Create another for loop that will loop from 0 to 4, indicating the y-coordinates of the micro:bit instead. This for loop will light each LED by column.
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```blocks
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for (let i = 0; i < 5; i++) {
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for (let j = 0; j < 5; j++) {
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}
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}
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```
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We will light up each LED by plotting them individually.
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```blocks
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for (let i = 0; i < 5; i++) {
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for (let j = 0; j < 5; j++) {
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led.plot(i, j)
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basic.pause(200)
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}
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}
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```
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The pause will add a delay between lighting each LED.
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```blocks
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for (let i = 0; i < 5; i++) {
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for (let j = 0; j < 5; j++) {
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led.plot(i, j)
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basic.pause(200)
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}
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}
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```
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### ~avatar avatar
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Excellent, you're ready to continue with the [challenges](/microbit/lessons/strobe-light/challenges)!
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### ~
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