aa0476c1da
* Change default value in Javascript. Per @microbit-mark 's suggestion, add an example of how to change the default interval value by switching to Javascript. * edits to new example
59 lines
1.3 KiB
Markdown
59 lines
1.3 KiB
Markdown
# Show Icon
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Shows the selected icon on the LED screen
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```sig
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basic.showIcon(IconNames.Heart)
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```
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## Parameters
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* ``icon``, the identifier of the icon to display
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* ``interval`` (optional), the time to display in milliseconds. default is 600.
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## Example
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This program shows a happy face and then a sad face with the ``show icon`` function, with a one second pause in between.
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```blocks
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basic.showIcon(IconNames.Happy)
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basic.pause(1000)
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basic.showIcon(IconNames.Sad)
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```
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## Beating Heart
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You can create a beating heart by using the forever block as follows:
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```blocks
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basic.forever(function () {
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basic.showIcon(IconNames.Heart)
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basic.showIcon(IconNames.SmallHeart)
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})
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```
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## Fast Beating Heart
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You could slow down the previous animation by inserting a pause block:
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```block
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basic.pause(1000)
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```
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...but how would you speed it up?
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You can change the default pause value, which is set in the ``interval`` parameter, to be smaller than `600` by changing it in the JavaScript editor.
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This JavaScript code creates a crazy fast heart beat! Did you know that a hamster's heart beats at a rate this fast?
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```typescript
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basic.forever(function () {
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basic.showIcon(IconNames.Heart, 60)
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basic.showIcon(IconNames.SmallHeart, 60)
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})
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```
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## See also
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[showLeds](/reference/basic/show-leds)
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