111 lines
2.1 KiB
Markdown
111 lines
2.1 KiB
Markdown
# spinner activity
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Create an arrow that randomly points to a player.
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### ~avatar avatar
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### ~
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Welcome! This guided tutorial will teach how to program a script that randomly points to a player. Let's get started!
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Let's begin by adding an `on shake` condition to know when the micro:bit is shaken.
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```blocks
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input.onGesture(Gesture.Shake, () => {
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})
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```
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Now let's randomly generate a number from 0 to 3 so that we can randomly display an arrow in a given direction.
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```blocks
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input.onGesture(Gesture.Shake, () => {
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let randomArrow = Math.random(4)
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if (randomArrow == 3) {
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basic.showLeds(`
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. . # . .
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. # # # .
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# # # # #
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. . # . .
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. . # . .
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`)
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}
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})
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```
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Now let's handle each of the cases by displaying the appropriate arrow. (Let's display an up arrow if `random arrow` is 0.
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```blocks
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input.onGesture(Gesture.Shake, () => {
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let randomArrow = Math.random(4)
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if (randomArrow == 3) {
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basic.showLeds(`
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. . # . .
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. # # # .
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# # # # #
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. . # . .
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. . # . .
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`)
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}
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if (randomArrow == 2) {
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basic.showLeds(`
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. . # . .
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. . # . .
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# # # # #
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. # # # .
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. . # . .
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`)
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}
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})
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```
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Now let's handle the rest of the cases for `random arrow`.
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```blocks
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input.onGesture(Gesture.Shake, () => {
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let randomArrow = Math.random(4)
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if (randomArrow == 3) {
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basic.showLeds(`
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. . # . .
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. # # # .
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# # # # #
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. . # . .
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. . # . .
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`)
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}
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if (randomArrow == 2) {
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basic.showLeds(`
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. . # . .
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. . # . .
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# # # # #
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. # # # .
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. . # . .
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`)
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}
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if (randomArrow == 1) {
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basic.showLeds(`
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. . # . .
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. # # . .
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# # # # #
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. # # . .
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. . # . .
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`)
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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](/lessons/spinner/challenges)!
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### ~
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