52 lines
1.4 KiB
Markdown
52 lines
1.4 KiB
Markdown
# Plot
|
|
|
|
Turn on a LED light on the [LED screen](/device/screen). Specify which LED using x, y coordinates. Use [unplot](/reference/led/unplot) to turn a LED off.
|
|
|
|
```sig
|
|
led.plot(0,0);
|
|
```
|
|
|
|
### 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)
|
|
|
|
If a parameter is [out of bounds](/reference/out-of-bounds) (a value other than 0-4), then this function will do nothing.
|
|
|
|
### x, y coordinates?
|
|
|
|
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).
|
|
|
|
This code turns on the centre LED:
|
|
|
|
```blocks
|
|
led.plot(2, 2)
|
|
```
|
|
|
|
### Get the LED on/off state
|
|
|
|
Use the [point](/reference/led/point) function to find out if a LED is on or off.
|
|
|
|
### Example: a square
|
|
|
|
The following example uses a [for loop](/reference/loops/for) and the `plot` function to turn on the LED lights along the edge of the screen, making a square:
|
|
|
|
```blocks
|
|
for (let i = 0; i < 5; i++) {
|
|
led.plot(0, i)
|
|
led.plot(4, i)
|
|
led.plot(i, 0)
|
|
led.plot(i, 4)
|
|
basic.pause(500)
|
|
}
|
|
```
|
|
|
|
### Lessons
|
|
|
|
[blink](/lessons/blink), [beautiful image](/lessons/beautiful-image), [strobe light](/lessons/strobe-light)
|
|
|
|
### See also
|
|
|
|
[unplot](/reference/led/unplot), [point](/reference/led/point), [LED screen](/device/screen)
|
|
|