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Rewrote in simpler language

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Ron Hale-Evans 2016-06-13 13:39:05 -07:00
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docs/reference/led/unplot.md
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# Unplot
Turn off a LED light on the [LED screen](/device/screen). Specify which LED using x, y coordinates. Use [plot](/reference/led/plot) to turn a LED on.
Turn off the LED light you say on the [LED screen](/device/screen).
```sig
led.unplot(0,0)
```
## ~hint
Use [plot](/reference/led/plot) to turn **on** an LED.
## ~
### Parameters
* x - [Number](/reference/types/number); the *x coordinate* or horizontal position (0, 1, 2, 3, 4)
* y - [Number](/reference/types/number); the *y coordinate* or vertical position (0, 1, 2, 3, 4)
* **x** is a [number](/reference/types/number) that means the horizontal spot on the LED screen (from left to right: 0, 1, 2, 3, or 4)
* **y** is a [number](/reference/types/number) that means the vertical spot on the LED screen (from top to bottom: 0, 1, 2, 3, or 4)
If a parameter is [out of bounds](/reference/out-of-bounds) (a value other than 0-4), this function will do nothing.
If a parameter is [out of bounds](/reference/out-of-bounds) (a value
other than 0 to 4), then this function will do nothing.
### x, y coordinates?
### ~hint
The LED screen is made up of 25 LEDs arranged in a 5x5 grid. To figure out the ``x``, ``y`` coordinates, see [LED screen](/device/screen).
The LED screen is a solid square of LEDs with five LEDs on each side.
To learn more about how you number the LEDs with ``x`` and ``y``
coordinates, see [LED screen](/device/screen).
This code turns off centre LED:
### ~
```blocks
led.unplot(2, 2)
```
### Example: Center off
### Get the LED on/off state
Use the [point](/reference/led/point) function to find out if a LED is on or off.
### Example: toggle off
This code creates and shows an image on the micro:bit screen, and then clears the centre LED using `unplot`:
This program shows a picture on the LED screen, and then turns off the center LED with `unplot`.
```blocks
basic.showLeds(`
@ -43,7 +44,14 @@ basic.pause(500)
led.unplot(2, 2)
```
### ~hint
Use the [point](/reference/led/point) function to find out if an LED is
on or off.
### ~
### See also
[plot](/reference/led/plot), [point](/reference/led/point), [LED screen](/device/screen), [create image](/reference/images/create-image)
[plot](/reference/led/plot), [point](/reference/led/point), [LED screen](/device/screen)