48 lines
1.6 KiB
Markdown
48 lines
1.6 KiB
Markdown
# Show Image
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Show an [image](/reference/images/image) (picture) on the
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[LED screen](/device/screen). After the @boardname@ shows an image, it
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will pause for 400 milliseconds (1000 milliseconds is one second).
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```sig
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let item: Image = null;
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item.showImage(0);
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```
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## Parameters
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* an [image](/reference/images/image) (picture). It is usually a square with five LEDs on a side, but it might be wider.
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* a [number](/types/number) that says how many LEDs from the left of the picture the @boardname@ should start. `0` means start at the first **frame** of the picture, `5` means start at the second frame, `10` means start at the third, and so on.
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## Example: Flip-flopping arrow
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This program makes a big image with a frame of an arrow pointing up,
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and a frame of an arrow pointing down. If you press button `A`, the
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program will use ``show image`` to show the arrow pointing up. (It
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starts `0` LEDs from the left in the big image.) If you press button
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`B`, the program will use ``show image`` to show the arrow pointing
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down, which starts `5` LEDs from the left.
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```blocks
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let arrows = images.createBigImage(`
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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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input.onButtonPressed(Button.A, () => {
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arrows.showImage(0);
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});
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input.onButtonPressed(Button.B, () => {
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arrows.showImage(5);
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});
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```
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## See also
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[image](/reference/images/image),
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[create image](/reference/images/create-image),
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[create big image](/reference/images/create-big-image),
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[scroll image](/reference/images/scroll-image), [show animation](/reference/basic/show-animation)
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