64 lines
1.6 KiB
Markdown
64 lines
1.6 KiB
Markdown
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# Plot Brightness
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Turn on a LED light with a specific brightness on the [LED screen](/device/screen).
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```sig
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led.plotBrightness(0,0, 128);
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```
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### Parameters
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* ``x`` is a [number](/types/number) that means the
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horizontal spot on the LED screen (from left to right: 0, 1, 2, 3,
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or 4)
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* ``y`` is a [number](/types/number) that means the vertical
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spot on the LED screen (from top to bottom: 0, 1, 2, 3, or 4)
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* ``brightness` is a [number](/types/number) that represents the brightness of the LED, from 0 (off) to 255 (full brightness)
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If a parameter is [out of bounds](/reference/out-of-bounds) (a value
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other than 0 to 4), then this function will do nothing.
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### ~hint
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The LED screen is a solid square of LEDs with five LEDs on each side.
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To learn more about how you number the LEDs with ``x`` and ``y``
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coordinates, see [LED screen](/device/screen).
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### ~
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### Example: One LED
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This program turns on the bottom right LED at 50% brightness
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```blocks
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led.plotBrightness(2, 2, 128)
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```
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### Example: Square
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This program uses a [for loop](/blocks/loops/for)
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and the `plotBrightness` function
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to make a square around the edges of the LED screen.
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```blocks
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for (let i = 0; i < 5; i++) {
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led.plotBrightness(0, i, 64)
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led.plotBrightness(4, i, 128)
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led.plotBrightness(i, 0, 172)
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led.plotBrightness(i, 4, 255)
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basic.pause(500)
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}
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```
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### ~hint
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Use the [point](/reference/led/point) function to find out if an LED is
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on or off.
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### ~
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### See also
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[plot](/reference/led/plot), [unplot](/reference/led/unplot), [point](/reference/led/point), [LED screen](/device/screen)
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