pxt-calliope/docs/reference/basic/show-leds.md

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# Show LEDs
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Display an image on the BBC micro:bit's [LED screen](/device/screen).
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```sig
basic.showLeds(`
. . . . .
. # . # .
. . # . .
# . . . #
. # # # .
`
)
```
### Parameters
* `leds` is a [String](/reference/types/string) that shows which LEDs are on and off.
* `ms` is an optional [Number](/reference/types/number) that shows how many milliseconds to wait after showing a picture.
If you are programming with blocks, `ms` starts out as 400 milliseconds.
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### Example
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Open the `basic` card in the Block Editor and select the `show leds` blocks.
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```blocks
basic.showLeds(`
# # . # #
# # . # #
. # # # .
. # . # .
. # . # .
`
)
```
If you are programming in JavaScript, `#` means an LED that is turned on and `.` means an LED that is turned off.
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### See also
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[plot leds](/reference/led/plot-leds), [show animation](/reference/basic/show-animation)
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