pxt-calliope/docs/lessons/strobe-light.md
2016-03-29 16:17:34 -07:00

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# strobe light lesson
Learn how to create a blinking LED script. #LED #screen #plot #docs
### @video td/videos/strobe-light-0
## Topic
For Loop
## Quick links
* [activity](/microbit/lessons/strobe-light/activity)
* [challenges](/microbit/lessons/strobe-light/challenges)
## Documentation
```docs
led.plot(0, 0)
led.unplot(0, 0)
for (let i = 0; i < 5; i++) {
}
basic.pause(100)
```
## Objectives
* learn how to repeat code a fixed number of times
* learn how to turn on a LED light on the LED screen. Specify with LED using x, y coordinates
* learn how to turn off a LED light on the LED screen. Specify which LED which x, y coordinates
* learn how to pause program execution for the specified number of milliseconds