pxt-calliope/docs/lessons/answering-machine.md
2016-11-01 10:42:42 -07:00

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# answering machine blocks lesson
Create an answering machine on the @boardname@
## Topic
Show String
## Quick Links
* [activity](/lessons/answering-machine/activity)
* [quiz](/lessons/answering-machine/quiz)
* [quiz answers](/lessons/answering-machine/quiz-answers)
* [challenges](/lessons/answering-machine/challenges)
## Prior learning / place of lesson in scheme of work
Learn how to creating a message with a **string**, `show string` to write your message. We will be learning how to create a message using simple commands, such as show string and on button pressed.
## Documentation
```cards
basic.showString('Hi!')
input.onButtonPressed(Button.A, () => {})
```
## Objectives
* learn how to show a string on the LED screen one character at a time
* learn how to use to register an event handler that will execute whenever an input button is pressed