pxt-calliope/olddocs/lessons/flashing-heart/quiz-answers.md
Tom Ball f4eca66648 move lessons out of web site
will move select lessons back to "educators" section
2016-06-14 11:49:58 -04:00

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# flashing heart blocks quiz answers
Learn how to create an image with a variable.
This is the answer key for the [flashing heart quiz](/lessons/flashing-heart/quiz).
## 1. Describe what pause does
Pause program execution for the specified number of milliseconds.
## 2. Write the code that leaves an image on the screen for 1 second (1000 milliseconds)
```blocks
basic.pause(1000)
```
## 3. Write the code that leaves an image on the screen for 1.5 seconds (1500 milliseconds)
```blocks
basic.pause(1500)
```